I was asc 3 playing against high ascendant players with averaging 17-19 kills a game now im ascendant 1 playing against high diamond and cant even kill 5 people sometimes in a game it feels like im boosted or smth

Hi All, fairly new to this sub so apologies if this has been asked before. I am currently Asc 2, and struggling to climb any higher. I have a suspicion that counter strafing (something I almost never do due to zero counter strike experience...