Low ping vs high pingers

So why is it that ppl with bad connections vs high get an advantage lile seriously my ping is like 5 ms most oftime and when i shoot ppl shot dont register sometimes are im getting outgunned cuz he freaking 2 burst me in my screen when i u hitted a full clip into the dude it doesnt make sense what so ever are the dedicated servers so bad?? Are they just cheaping out on servers like cmon on csgo no isseus what so ever this game only bugs errors matchmaking so bad

Its been a problem. I think its a desync issue but I’m not sure. Some games everything registers, others nothing connects.