Low range issue archer c6 v2

I'm using 23.05.5 but my wifi range got decreased specially 5G one and I'm also getting less upload speed than original tp link firmware. It's around 40-50mbps where as my isp offers upto 1gbps. Earlier i used to get 300 mbps.
Can anyone help to fix these things?
TIA

OEM fw uses hardware offload drivers that are not open sourced. You can approximate them choosing offload levels in network/firewall tab.

Please connect to your OpenWrt device using ssh and copy the output of the following commands and post it here using the "Preformatted text </> " button:
grafik
Remember to redact passwords, MAC addresses and any public IP addresses you may have:

ubus call system board
cat /etc/config/network
cat /etc/config/wireless
cat /etc/config/dhcp
cat /etc/config/firewall
"kernel": "5.15.167",
        "hostname": "OpenWrt",
        "system": "Qualcomm Atheros QCA956X ver 1 rev 0",
        "model": "TP-Link Archer C6 v2 (US) / A6 v2 (US/TW)",
        "board_name": "tplink,archer-c6-v2-us",
        "rootfs_type": "squashfs",
        "release": {
                "distribution": "OpenWrt",
                "version": "23.05.5",
                "revision": "r24106-10cc5fcd00",
                "target": "ath79/generic",
                "description": "OpenWrt 23.05.5 r24106-10cc5fcd00"
        }
}
root@OpenWrt:~# cat /etc/config/network

config interface 'loopback'
        option device 'lo'
        option proto 'static'
        option ipaddr '127.0.0.1'
        option netmask '255.0.0.0'

config globals 'globals'
        option ula_prefix 'fdba:2595:db0f::/48'

config device
        option name 'br-lan'
        option type 'bridge'
        list ports 'eth0.1'

config interface 'lan'
        option device 'br-lan'
        option proto 'static'
        option ipaddr '192.168.1.1'
        option netmask '255.255.255.0'
        option ip6assign '60'

config interface 'wan6'
        option device 'eth0.2'
        option proto 'pppoe'
        option username '*****'
        option password '****3'
        option ipv6 '0'
        option type 'bridge'

config switch
        option name 'switch0'
        option reset '1'
        option enable_vlan '1'

config switch_vlan
        option device 'switch0'
        option vlan '1'
        option ports '2 3 4 5 0t'

config switch_vlan
        option device 'switch0'
        option vlan '2'
        option ports '1 0t'

root@OpenWrt:~# cat /etc/config/wireless

config wifi-device 'radio0'
        option type 'mac80211'
        option path 'pci0000:00/0000:00:00.0'
        option channel '149'
        option band '5g'
        option cell_density '3'
        option country 'BD'
        option htmode 'VHT80'
        option txpower '23'

config wifi-iface 'default_radio0'
        option device 'radio0'
        option network 'lan'
        option mode 'ap'
        option ssid 'Jackal'
        option encryption 'psk2'
        option key 'opEnWRt111'
        option hidden '1'

config wifi-device 'radio1'
        option type 'mac80211'
        option path 'platform/ahb/18100000.wmac'
        option channel 'auto'
        option band '2g'
        option htmode 'HT40'
        option cell_density '3'
        option country 'BD'
        option txpower '20'

config wifi-iface 'default_radio1'
        option device 'radio1'
        option network 'lan wan6'
        option mode 'ap'
        option ssid 'Jackal'
        option encryption 'psk2'
        option hidden '1'
        option key 'opEnWRt111'

root@OpenWrt:~# cat /etc/config/dhcp

config dnsmasq
        option domainneeded '1'
        option boguspriv '1'
        option filterwin2k '0'
        option localise_queries '1'
        option rebind_protection '1'
        option rebind_localhost '1'
        option local '/lan/'
        option domain 'lan'
        option expandhosts '1'
        option nonegcache '0'
        option cachesize '1000'
        option authoritative '1'
        option readethers '1'
        option leasefile '/tmp/dhcp.leases'
        option resolvfile '/tmp/resolv.conf.d/resolv.conf.auto'
        option nonwildcard '1'
        option localservice '1'
        option ednspacket_max '1232'
        option filter_aaaa '0'
        option filter_a '0'

config dhcp 'lan'
        option interface 'lan'
        option start '100'
        option limit '150'
        option leasetime '12h'
        option dhcpv4 'server'
        option dhcpv6 'server'
        option ra 'server'
        option ra_slaac '1'
        list ra_flags 'managed-config'
        list ra_flags 'other-config'

config odhcpd 'odhcpd'
        option maindhcp '0'
        option leasefile '/tmp/hosts/odhcpd'
        option leasetrigger '/usr/sbin/odhcpd-update'
        option loglevel '4'

root@OpenWrt:~# cat /etc/config/firewall

Check if it helps

Set crll density to 1 normal or 0 disabled

It was disabled before but same result. I just set this today

config wifi-device 'radio0'
        option type 'mac80211'
        option path 'pci0000:00/0000:00:00.0'
        option channel '149'
        option band '5g'
-        option cell_density '3'
        option country 'BD'
-        option htmode 'VHT80'
+# Bangladesh Special
+       option htmode 'VHT40'
-        option txpower '23'

config wifi-iface 'default_radio0'
        option device 'radio0'
        option network 'lan'
        option mode 'ap'
        option ssid 'Jackal'
        option encryption 'psk2'
        option key 'opEnWRt111'
-        option hidden '1'

config wifi-device 'radio1'
        option type 'mac80211'
        option path 'platform/ahb/18100000.wmac'
        option channel 'auto'
        option band '2g'
-        option htmode 'HT40'
+       option htmode 'HT20'
-        option cell_density '3'
        option country 'BD'
-        option txpower '20'

config wifi-iface 'default_radio1'
        option device 'radio1'
-        option network 'lan wan6'
+       option network 'lan'
        option mode 'ap'
        option ssid 'Jackal'
        option encryption 'psk2'
-        option hidden '1'
        option key 'opEnWRt111'

higjlighted all wrongs, 2ghz band *s connected 50/50 lan or wan, not both. Where 5ghz does not reach you get badly broken net.
BD has only 120MHz 5ghz band allowed. 40MHz at least gives some breathing space.

ath79, like your router, is good for 150-180 MBit/s routing throughout, that's the end of the line. Software flow-offloading can extend (cheat) that to ~300-350 MBit/s.

For 1 GBit/s, you need different -much newer- hardware and even today not all devices will go the whole nine yards at 1 GBit/s.

You can get 1.1gbps iif ath79 has 2 SerDes (ie eth1) and you disable vlan tags, with one eth0 you can disable wan tagging and get 600-700mbps with offload obviously. But with so much config creativity i doubt it could materialize. In addition to handbrake for engine some wheels are square too...

My performance estimates may be slightly on the pessimistic range, but consistently so between all targets - and the values are dependable real-life ones, not hand-picked setups (and never involving cheats like flow-offloading, NSS, et al). Around 180 MBit/s (for the newer 720/ 750 MHz SOCs) is the absolute maximum I would trust ath79 to do, based on my decade long usage of the 560 MHz ar9344, anything beyond that is mostly good luck to fool the benchmark.

Cpu is so power-lacking that running "top" costs 50Mbps
I measured on c7v2 and v5, unlikely i tricked waveform and netflix both at once. Indeed proportionate down for old slow cpus.
I just subtly described lack if vlan de/encoding in eth driver that can be at least partislly worked around.
1.1gbps is half of "gigabit ethernet" but all benchmarks will pass it for gigabit....

I'm confused what to do?

Now both 2.4 N 5 are connected to lan and wan
With force 40mhz channel
With cellphone density normal is it what you asked to do?

Read the post again and then some. Wifi can connect to ONE bridge not two.

Red means delete green means add

What is t
option hidden '1' ? I can't find this option
Red have to be in default value?

You posted /etc/config/wireless which is quite wrong.