Question Certain games crashing on startup with no solution.

[JumperCat]

Hello everyone.
it has been weeks since rainbow six siege (and since yesterday, fortnlte) had been crashing on startup (usually ran when not in focus but once i tabbed in the game it would freeze and terminate.) ive tried literally everything I could find. countless of sfc scans, clean boots and dism restore health's, resetting my pc (which was on windows 10) and even upgrading to windows 11 (i can run them fine). Startup repair and uninstalling windows updates isnt allowed by my computer, it just fails. Given that other games (pubg, rocket league, brawlhalla, sea of thieves to name a few) run perfectly fine, what is going on with my computer?!IS it faulty hardware??
List of some specs below
Win11 home
Ryzen 5 3600
Powercolor Radeon RX 6600 hellhound
msi tomahawk max II b450 am4
16 gb kingston/hyperx fury 3200mhz ram
Corsair bronze cv550 (i believe.)
1 kingston ssd 240gb (windows on it)
wd blue m.2 1TB (games on it)
Thanks in advance if you get to help me with this, as I have struggled for more than 18 hours on my screen fixing it.

 

[Lutfij]

Corsair bronze cv550 (i believe.)
How old is the PSU in your build?

resetting my pc (which was on windows 10) and even upgrading to windows 11 (i can run them fine
So you didn't perform a clean install of Windows 11, recreating the installer to rule out a corrupt installer?

BIOS version for your motherboard?

 

[JumperCat]

How old is the PSU in your build?
if youre asking how long ive had it for, i think about 1.5 year.

So you didn't perform a clean install of Windows 11, recreating the installer to rule out a corrupt installer?
Before the upgrade, i had also installed new windows 10 and the games still crashed.
Edit: after the upgrade, since the games still crashed i did format both my drives. So I think that is a clean install

MSI click bios 5, latest version.

Sorry if im replying somewhat wrong, its one of my first times looking for help on a forum!