I have bad fps, stutters, and horrible hitreg only in competitive, spike, dm and casuals are fine? Is this anticheat ruining my game or what? Does someone know how to fix?

Hello, my left click button is giving me problems lately and I can't buy any weapons or shields in the game. Because macros are not allowed in the game, I cannot use any macros for left clicking, or even the Windows solutions like shifting...

I just encountered the agent once and well it was annoying but amazing at the same time. Need advice and views before activating his contract