Still using my RX 5700 XT. The amdgpu driver had a major issue resuming from suspend a few months ago[0], but other than that, I'm not aware of (nor have I experienced) any stability issues. Maybe you had a bad card.

0: https://gitlab.freedesktop.org/drm/amd/-/issues/4531

I don't like to spend much on hardware, so I bought an 5700XT a few years ago and run a "steam machine" of sorts. Never had any Linux-related problems.