Yes, the game is a diva. But if it would be a general problem with "bad coding" then everyone would have problems.
I don't know why the game triggers some instabilities and other applications do not. There are some possibilities: the game triggers power supply issues, it triggers issues with (automatic) overclocking/CPU/GPU boosting, it triggers issues with bad memory modules, bad drivers etc.
And then there are other things that can affect the system stability. The AMD platform had for a long time issues with PCIe 4.x. Then they had issues with USB which caused problems with AR helms/glasses etc. To fix those issues you should always have the newest BIOS of your motherboard installed. Those issues are fixed with microcode updates for the CPU.
I was also affected by the PCIe 4.x issue and had crashes in FF14. I have switched to PCIe 3 in the BIOS and the crashes went away. Months later AMD published a new Agesa version and the PCIE 4.x issues were fixed.
This are issues which have nothing to do with the game.
Cheers