[Solved] 802.11ax worse than 802.11ac with mt76 driver?

A quick comparison of AX vs AC both on 80MHz channel 64 one floor so a few meters on rt3200 with a 7915 chip on openwrt r21885 with all offloading including wifi downstream on a Macbook Air M2. Even saw some RTT over 1000 ms on a couple of AX runs. iperf server on a raspberry connected with ethernet.

AX
[  7]   0.00-1.00   sec  6.04 MBytes  50.6 Mbits/sec  408336   1.34 MBytes   412ms
[  7]   1.00-2.00   sec  39.6 KBytes   325 Kbits/sec    0    987 KBytes   662ms
[  7]   2.00-3.00   sec  1.60 MBytes  13.4 Mbits/sec  653944    822 KBytes   489ms
[  7]   3.00-4.01   sec  1.53 MBytes  12.8 Mbits/sec    0   1.11 MBytes   596ms
[  7]   4.01-5.01   sec   382 KBytes  3.13 Mbits/sec    0   1.05 MBytes   512ms
[  7]   5.01-6.00   sec  2.91 MBytes  24.6 Mbits/sec    0    877 KBytes   627ms
[  7]   6.00-7.00   sec  2.35 MBytes  19.6 Mbits/sec    0   1.08 MBytes   573ms
[  7]   7.00-8.00   sec   524 KBytes  4.30 Mbits/sec    0   1.00 MBytes   485ms
[  7]   8.00-9.00   sec  2.68 MBytes  22.5 Mbits/sec    0   1.08 MBytes   572ms
[  7]   9.00-10.00  sec  2.09 MBytes  17.5 Mbits/sec    0   1.10 MBytes   663ms
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  7]   0.00-10.00  sec  20.1 MBytes  16.9 Mbits/sec  1062280             sender
[  7]   0.00-10.60  sec  18.7 MBytes  14.8 Mbits/sec                  receiver

AC
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd          RTT
[  7]   0.00-1.00   sec  43.9 MBytes   368 Mbits/sec  4881208   1.48 MBytes   20ms
[  7]   1.00-2.00   sec  50.0 MBytes   420 Mbits/sec  2896000   1.53 MBytes   23ms
[  7]   2.00-3.00   sec  50.4 MBytes   423 Mbits/sec  1448000   1.57 MBytes   16ms
[  7]   3.00-4.00   sec  51.3 MBytes   431 Mbits/sec    0   1.61 MBytes   35ms
[  7]   4.00-5.00   sec  44.5 MBytes   373 Mbits/sec  1531984   2.04 MBytes   25ms
[  7]   5.00-6.00   sec  42.5 MBytes   356 Mbits/sec  1743392   2.05 MBytes   51ms
[  7]   6.00-7.00   sec  45.2 MBytes   380 Mbits/sec    0   2.06 MBytes   38ms
[  7]   7.00-8.00   sec  47.8 MBytes   401 Mbits/sec  1867920   1.56 MBytes   33ms
[  7]   8.00-9.00   sec  46.2 MBytes   386 Mbits/sec  1614520   1.18 MBytes   62ms
[  7]   9.00-10.00  sec  44.7 MBytes   375 Mbits/sec  1669544   1.90 MBytes   35ms
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  7]   0.00-10.00  sec   466 MBytes   391 Mbits/sec  17652568             sender
[  7]   0.00-10.02  sec   464 MBytes   388 Mbits/sec                  receiver
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