Hey, I'm having a problem with the game. I have Jump binded to the mousewheel and all, but it doesn't work ? It jumps, yeah, but there's like a cooldown. It takes seconds to let me jump again. Is this a problem for me only ?

You're not meant to use the scrollwheel to bhop in Quake because the jump input is buffered (unlike in Half-Life 1 for example). The way you bhop in Quake is you press spacebar, release it for a split second while mid-air and then start holding it again. The moment you land on the ground, you will jump again at a perfect timing. After you jump, release spacebar again and hold it again until you jump again. Rinse and repeat.

Ah alright, thank you so much!!