yeah that's kinda true, i did it without premade as well. but i was lvl 8 in faceit with the same sens, at least that's my peak in faceit after 100+ games or so but haven't played ever after. even in lvl 8 i was consistently top fragging vs lvl 10 smurfs half the times but kept losing games so i quit. so my aim has never been a problem.
33% in faceit are boosted NPC's who get carried every game, 33% actual decent players with deserved ranks and 33% are smurfs. i had better teamplay with randoms in mm global lol.