This video explained alot of hit detection problems.

https://www.youtube.com/watch?v=yRjinAVoIAo

Problem 1 hitmarkers not updateing fast enough when firing at someone. Example someone peaks and goes in cover they died peaking the cover but the shots register around the corner rather than on the corner where he peaked and got shot the cover example btw.

Problem 2 when getting shot at red hitmarkers display too slow on screen.

Problem 3 charater animations when enemy is shooting at u but not looking in your direction need to update enemies looking direction/animations. Also does this mean your own direction and animations are delayed to server if so fix.

This video is proof time to death and time to kill doesn't update fast enough and niether does charater animations. I hope devs know about this and are fixing these issues.