Well, I've tried multiple setups, and I really doubt it's my $5,000 dollar PC.

How can I assist?

Any update on this, it's been another 2 weeks and still having the same issue.

1. No M&K.
2. Yes, pretty heavily, however it happens on lower modified servers too.
3. I use a hardwired Xbox Elite series 2 controller. (I've already debunked it being stick drift as it happens with 4 different controllers and using a hardware system that checks for that.)

Is there any update on this? It's been 2 weeks and still suffering from the same issue.