My only issue with fairphone is that the phones simply haven't been high end enough. But they're slowly solving that, each new phone has been a lot better.
Framed-Photo
I do wonder when the AI bubble is gonna burst. Certainly it can't be this popular forever, right?
Some of the problems you're describing are not Linux issues specifically. Nvidia has worked a lot to make their hardware, specifically their proprietary hardware, the industry standard for productivity applications. That's why Nvidia works better for those things. It's like this on Windows too, that's not a Linux problem.
Where AMD does work better is for...everything else on Linux. OP might not have run into issues like this because Nvidia has gotten a lot better recently. But new things often don't work well or at all on Nvidia (wayland is a great example, it only recently got some critical fixes after months if not years), bugs can take far longer to squash if they're to do with something on Nvidias side, etc.
I'm on a 5600, I would 100% upgrade to a 5700X3D if the price is good.
I'm on a 5600 and would consider this.... If it's significantly cheaper then the 5800x3d.
But I'm expecting it to be a small discount.