REVERSEDSKIES

After testing pretty much everything suggested, it hasn't really made a  diference. No ethernet driver installed did make the stutters less but that's not a viable solution at all. Disabling hyperthreading didn't do the trick either. The biggest diference still seems to come from disabling HPET. It doesn't get rid of the stutters entirely but it gets rid of most, to the point my PC is usable again without having to try any workarounds. The stuttering still shows up mostly after running a more CPU intensive task like gaming for example, after closing the game it's like the system goes back down to a more low power state which causes the stutering to appear and generally having to try the mouse polling rate workaround again.
 
It is probably down to a very unfortunate compatibility issue of this audio interface and my PC components. Whether it's the motherbaord and it's USB configuration, the B550 chipset or even the R7 5700X. Heck maybe even the memory running at it's rated 3600MHz instead of the default of like....2133 I believe? I have no clue.
 
I have now bought a new interface, a Focusrite Scarlet 18i8 gen 3, which I hope will perform just like my old Bheringer did. Without issues. But that's for later when it arrives.
 
I do wanna thank everyone for leaving suggestions on what to try and helping to figure out what the problem is. Sadly it is just much more complicated and I don't think any one of us wants to put in the time to figure out the nitty gritty lol. Big thanks to you especially @Fred Castellum for the fast and detailed help.
 
So that's all for now o/

Well considering my previous interface had no issues and neither did my an Audient ID4 that my brother owns, I doubt an interface from a brand that isn't M-Audio should have issues.
 
I'll take tomorrow to try everything suggested here and see if anything fixes, from the hyperthreading disbling or even getting rid of my ethernet driver (I might just take that drive and make it a Windows test installation again).
But for the rest of today I'll be looking for any audio interfaces that have a good amount of gain on the mic preamps, good sound and nice features. Anything that isn't Audient tho lol. I'll see if I can find anything.
 
For now thanks for the help! I'll be seeing if any of it cna solve this damn issue

Okay so since I'm on W10 Home I had to use a different method to get Hyper V since QEMU didn't want to work but it works now! I always thought hyper V was something similar to unraid, that it runs in between your hardware and your VMs as just a layer instead of it being a virtual machine software that you could just run within windows.
But thank you for your help!