Here's a REALLY good PC Optimization guide that I can heavily vouch for. Hopefully a lot of people see this and can make their games feel absolutely insane. The parts I used for ping is the "Hit reg" section

https://n1kobg.blogspot.com/ 

Credit to @davidandchicken for showing me this

There's still a lot of things you can do to optimize FPS/Input lag (one guide can only include so much), I'll try to post other guides in this thread

Here's another one: https://www.mikemartin.co/tweaks