Plutonium

It happens in the other maps too but I notice it most in origins. I don't remember the mud slowing you down to that extent but I feel extremely slow. Maybe I just haven't played the original in so long

When I am playing zombies I feel extremely slow, especially on origins in some muddy areas, I cant even move fast enough to evade sprinting zombies. I don't remember movement being this bad back in the day. I have my FPS maxed at 200 and sync every frame off but its still so slow. Is there a command or anything that helps?