Brawl Stars. Just pure braindead grinding and losing isn't frustrating(because the game is good)while the actual gameplay is actually with the very high ranks/trophies. That's where the filthy casul filter starts.
What makes a good matchmaking is good gameplay balance where playing the game is the main source of fun/satisfaction with winning as the added bonus. Wild Rift's problem is its one-side, no comebacks allowed meta.
Wild Rift's current matchmaking balance is shit and reeks of EOMM, that's why the game is barely alive. Low elo devs too.
CoD:M is just retarded one-sided coinflip.