is the tracker important?

Hello I've been seeing for a long time every time I go to play a competitive match anyone has a top tracker positive KD positive damage/round etc.. but he plays worse than a person who has negative KD and negative damage/round etc.. thanks in advance for your answers :)

bad games

unlucky game, boosted or in higher lobbies than usual

Wtf?
Ur statement is self contradictory
If u r talking abt 1 or 2 games doesn't matter
Tracker gives u overall input of the player
Ranks obv matter and also they must not exploit 5 stacking with ur low elo players