It is preferred you do not open multiple posts on the same topic on the forum.
I would have unlocked your thread, but I only just woke up. I’m pretty good at multi tasking, but not so much when I’m sleeping.
Generalizations are generally unhelpful. By which method did you disable MAC Address randomization.
The forum has lots of information on installing new kernels. You can install kernels through the Garuda GUI for managing your hardware. Also be sure to install the corresponding headers.
This can be done in the terminal as well.:
sudo pacman -Syu linux-next-git linux-next-git-headers
or:
sudo pacman -Syu linux-mainline linux-mainline-headers
Or:
sudo pacman -Syu linux linux-headers
Or:
sudo pacman -Syu linux-lts linux-lts-headers
You switch kernels at the advanced grub menu when you reboot. Multiple kernels can be installed at the same time with Garuda.