Sorry for digging, but i have found something that's really working for me...
First of all do clean windows install, install drivers and stuff, then disable windows update. Just don't mess with ur OS with placebo fixes, some of them will just make ur windows performance wors...
Launch ur favourite game and check current, it should be 0,5 ms (best scenario) or 1 ms. Now if u have as example 0,4969 or 0,9899 i mean the value is not EXACTLY 0,5 ms or 1 ms you have something called "desync".
Now run CMD as Administrator and paste these commands:
bcdedit /set useplatformclock no
bcdedit /set useplatformtick yes
bcdedit /set disabledynamictick yes
Now restart your pc, check current in TimerTool and after you launch your game it should be exactly 0,5 ms or 1 ms, if it is - you can test how it feels now. You can use TimerTool to force 0,5 ms to have better fps results, it's up to you.
For me it fixed hitreg issues, stuttering when enemies has been peeking, everything started to be super smooth and ofc input lag on my mouse was gone and movement was consistent as it should be.