I will explain how my network is
I have my ISP router in bridge mode where it is connected to openwrt and connected to a tp link ax20 router that distributes internet by cable and wifi
ISP > OpenWrt > tp-link Wifi
here the problem, internet is slow, i can't download anything and i also don't watch videos it is too slow but if i put my tp link router in AP mode internet works great then i read that it is due to NAT so i thought disable the NAT option would solve my problem but it was not like that