Extremely slow WiFi

[cscs]

@Internet speed is slow

swcrypto=1

Has no impact on modern iwlwifi module.

@Internet speed is slow

options iwlwifi power_save=0 # disables power management

This is disabled by default. And power management is handled by a different module - iwlmvm.

@Internet speed is slow

options iwlwifi 11n_disable=1 # disables 11n connections
options iwlwifi disable_11ac=1 # disables 11ac connections
options iwlwifi disable_11ax=1 # disables 11ax connections

This is pretty extreme. If one of these options is desirable it is usually 11n_disable=8, which in fact does not disable N but rather enables antenna aggregation.

So really, especially to begin, I would suggest instead:

/etc/modprobe.d/iwlwifi.conf

options iwlwifi 11n_disable=8 # enable antenna aggregation

If there are still issues … then it may be worth setting one of the options in iwlmvm:

power_scheme:power management scheme: 1-active, 2-balanced, 3-low power, default: 2 (int)

And if there are still issues … then maybe we can test disabling one or more of the modern standards.

https://wiki.archlinux.org/title/Network_configuration/Wireless#Intel