Lagging when shooting in TTT

Whenever I play TTT and I shoot, I lag. The game freezez and the sound also freezez on loop. I cant play the game at all. It also lags on round switch sometimes, and when I open up an ingame menu. Its making the game unplayable which is not good at all since I have over 3000 hours and love the game. I really need help. I have re installed the game 3/4 times completely to try to fix this, no luck. I have 16gb ram so that shouldnt be the issue. Thanks.

Does this happen on every server? Default weapons?