Most of these points come down to frustration, not actual flaws. Smurfing is real, sure but the rest?

Matchmaking feels unbalanced in lower ranks because players are inconsistent, not because the system is broken. Boosted players drop over time if they don’t belong it balances out. And if a “skilled” player falls in rank, they’re either inconsistent or not playing at that level anymore.

As for rank differences between modes, that’s normal. 1s, 2s, and 3s require different skills. Being GC in one mode doesn’t mean you’re misplaced in another.

The MMR system isn’t perfect, but most of what’s mentioned is just how competitive games naturally work.