It's been almost a month since I got my lovely Zephyrus G14 '22 and it was a tough beast to befriend, however - like humans - machines have their own personalities and you have to take time in order to understand what hurts and where exactly when you poke them in various places to fully take advantage of them. I'll probably add more stuff here as I go.
Update! (May 2024)
Turns out the reboots under load were caused by the fucked motherboard lol. Keep pestering the user support and RMA the device until it's fucking fixed (i.e. until they replace the stupid motherboard.) - paid for the whole machine, will use the whole damn machine. Took me 4 RMA requests to get it resolved...