I’m glad to hear that worked.
I suggest trying sudo iwconfig wlan0 power off replacing wlan0 as needed, this temporarily disables the wireless card’s power saving features.
Then check if the speed has improved, if not, skip the following.
If it has improved make the change permanent by adding the following to file /etc/pm/power.d/disable-wireless-power-management :
<span style="color:#323232;">#!/bin/bash
</span><span style="color:#323232;">/sbin/iwconfig wlan0 power off
</span>
Then run sudo chmod +x /etc/pm/power.d/disable-wireless-power-management
I assume the linux-firmware package is already installed, but double check if you’re not sure. It provides iwlwifi-8265-36.ucode in /usr/lib/firmware/ which I believe is your cards specific iwlwifi driver. Intel Wireless Firmware Page is the source that made me think to check.
If the above doesn’t work let me know as there’s a few more things we can try, but we’re reaching the end of our options.