Its becouse Matchmaking sucks in this game, thats all.
EA think that if u had last few games with few or no kills/dmg than u are a bot and they put you into bot lobby. Then u can easy win and they think that u are now pro so they put you in pred lobby.
ONLY one thing can determine your skill lvl.
KD rate but not that one that are displayed in Apex stats, but KD rate after few minutes after u land and find some weapon.
Situations where you land and die instantly because you found a bad weapon or you didn't find one at all should not be considered in this KD.