Alright, its a bit early to say because I need more online no crash time but it seems I managed to fix problem.

After crashes start happening I never really managed play even 1 frontline game (10-15 minutes) now I played 4, 1 hour afk, 2 Rival Wings games and didnt had a crash or any problem.
That is including a lot of stuff as a side programs, such as Discord, Google Chrome with million tabs, Spotify, VPN...

Last things I did in order to try fixing problem were:

• Reinstalled all VCRedists as it shown in this video for Death Stranding error https://youtu.be/iIWkMzcQa-g

• When crashes start appearing I noticed that 26.02.2025 I installed Microsoft Windows Desktop Runtime 9.0.2. Back then I tried deleting it but it didnt helped. Today I decided to try installing previous version 9.0.1 so it might be one of things that also helped

• Updated MSI Center and installed all related/or not drivers for everything (not graphic drivers tho, as it was one of first things I tried)

• (probably not the case but) Made discord to run as administrator

• I also not sure if I had it before or not (sorry, I really did a lot of things for past days to fix stuff) but I might set ffxivboot, ffxivboot64, ffxivupdater64 to run as administrator.

I will play more tomorrow to see if crash still happening or not. I hope not. And I hope this stuff will be useful for you @ThetaCoder and for anyone else who experienced problems.