It is possible to configure iwlwifi by adding options to /etc/modprobe.d/iwlwifi.conf.
I have seen people suggest to try and evaluate these options:
options iwlwifi 11n_disable=1
options iwlwifi 11n_disable=8
Don't forget to remove iwlmvm when reloading:
sudo modprobe -r iwlmvm
sudo modprobe -r iwlwifi
sudo modprobe iwlwifi
sudo modinfo iwlwifi for showing params (and other stuff).
for checking the running hardware:
lspci | grep -i network
sudo lshw -C network
https://forum.manjaro.org/t/wifi-network-speed-intel-wireless-7265-driver-iwlwifi/154472/6