100% convinced this is exclusively a hardware problem, and something about the way FF14 reacts to the way DirectX11 handles hardware errors. I'd bet money that if you remove all your peripherals and reconfigure the necessities into every possible configuration between game runs it would fix this for most people, provided you have some ports that are error free at least.

I don't think anything you do software-wise will fix this. Reinstalling things will just reset the clock until conditions are met again and errors start reoccurring.

Unfortunately it sounds like it's something very much engine related and not easy to reproduce unless your motherboard is wonky.