As manygames i think there is some cheaters even if you have the best anti cheat of the world. To be honnest in Valorant that's super rare to encouter cheaters or they are really smart and it's not obvious but imo, that's rare.
I'm immo 200rr on the EU serv, i've played against/with heretics players, davidp, scream, a lot of good players in soloq. They are all good. I play CS since 2001 then i'm supposed to guess (or not) what is legit or not in game.
Yesterday i've played against a jett she was doing 26 kills until we all say "ban jett" in the chat. After that she has done 1 or 2 kills in 5 rounds. She was impossible to 1v1, deagle, scout, vandal, she knew everything in game.
Then there is my advice, if you cheat that's your problem dude, but learn to play before you reach high elo in CS or Valo otherwise that's just ridiculous and obvious, even scream misses some shot, every human on earth does.
His nickname is RN h4rry on eu serv.