Since you've gone from nvidia to intel to amd in quick succession, it might be worth using DDU to thoroughly uninstall graphics drivers and then install the AMD graphics drivers again.
Nowadays you can often just swap and install, but not always when switching between completely different graphics drivers.
Your experience is certainly not normal. I'm using a 7800XT (Hellhound model) myself. No issues. Stock, undervolted, overclocked, undervolted and overclocked. Tried them all. No crashes. The only "issue" is that when I overclocked the undervolted GPU too much (~2700MHz, stock is 2430) the VRAM ran slower and performance was lower overall. Not sure why that happened. But it was still stable even then.
I'm running it at stock speeds with a mild GPU undervolt to 1080mV (stock is 1150). There's loads of headroom left. Most 7800XTs will be stable under 1000mV. Most will overclock further too. The overclocking is just for fun for me. Donkey Kong overclocking - How high can you go? Maybe I'll mess around a bit more later. Techpowerup got about +15% FPS with their Hellhound.
https://www.techpowerup.com/review/amd-radeon-rx-7800-xt/40.html
EDIT: Wait...you still have Intel Graphics Command Center installed? With an AMD card? Are you running both the AMD card and Intel onboard graphics simultaneously? If so, you could try disabling Intel onboard graphics and see if that helps with stability.