Huge lag spikes and stutering after season 3 patch

All was good untill season 3 patch. Now the whole game is extremly bright all the time and game stuters all the time. Hit detection is nightmare. About 50% of all my bulets dont register and every time i get colse to another palayer, friendy or foe i get HUGE lag spike. Internet and PC are not the problem. Every other game works perfecty. Tried to rapair and reinstal the game but nothing helps. In photo is example of what is happening when i get close to another player. Normaly my ping is around 10 ms.