Matchmaking adjustment just moved the problem now and made higher ranks mm worse with people bunching up there now. People higher up didn't get much if any of a bump in rank, in 1s where I was plat 3 I got a bump to diamond 1. Meanwhile in 2s, up in diamond 3 end of season 5, for season 6, nothing, maybe a div bump and that's it.
Solo queue is awful as you get people that were diamond 3 before the "adjustment" being teamed with people who got a free bump to diamond 2/3 with predictable results. Even in a party it's annoying, hardly any close games, games are a blowout one way or another. On top of that, for some reason people that were GC, champ 3 or 2 got dumped into high diamond/low champ depending on how placements went, so that's messing it up as well as not everyone can play a lot, so there's still a lot that haven't moved up.
Not the first time Psyonix done it, they need to stop messing around with it. If the majority of players are silver/gold, then that's where they are, no need to give a free bump.