I have started to experience an annoying and consistent stutter in Black Ops 3 in the main menus, and seemingly random fps drops that happen every few seconds in actual game play regardless if anything intensive is happening in the game. Here is a video of what the stutter looks like at the main menu https://www.youtube.com/watch?v=V9AosGEovf4
This did not happen the last time I played several months ago. I have tried everything I can think of to fix the issue, from almost every conceivable combination of graphics settings, to nuking the graphics drivers with DDU and then installing drivers that are over a year old.
I have finally narrowed down the issue to something that is running on my PC, as the problem disappeared when I booted with diagnostic startup enabled in system configuration. I just can't figure out what specific service or program is causing the issue at this point.
Here is a list of every service and program running on my PC at the moment https://pastebin.com/YaHZZHnd
If anyone has any idea of which of these could be causing an issue, your help would be appreciated.

Here are my specs so you don't think I'm wondering why a toaster is having problems running a video game:

Windows 10 Pro Version 20H2
Ryzen 9 5900x
x570-A PRO motherboard
32GB RAM @ 3200mhz
RTX 2080Ti
GeForce Game Ready Driver Version Version 512.59