First things first: please read this section at a minimum:
(though the other sections might catch your interest as well) 
then change to an LTS kernel.
You should so you can change things as now you’re on the UEFI firmware defaults.
pamac install tlp, tplui
tlpui &
Everything is relevant and why we ask this information: your disks might be dying and then you get weird behaviour.
I’m not very familiar with AMD processors, so have a look if this directory and its subdirectories has anything relevant to:
performancepstateturbo
Please include all the information you’ve removed from the Inxi output in your original post…
