A simple consecutive win/loss ratio or calculate it based on average xp. Anything is better than the one-sided stomps currently.
Before skill based matchmaking, games had server lobbies (iirc avp2010 on ps3?) but this idea died on next gen consoles for whatever reason.
So now you just have games ported from console with no matchmaking where you’re either curbstomping some pred who thinks he can melee the FT at full hp and gets parried and dies 2 minutes into the match or your teammates are focused on AI like potatoes with 30 damage on the predator at the endgame screen.

