How would you fix matchmaking? (RANKED)

I want to address a few problems with solo queue right now, with number 1 as a top priority. Just want to see what the community thinks what would be done to solve these problems.

1. Diverse MMR Players seem to have caught up to the 50/50% winrate system that league of legends has in place.. maybe it's interfering too much lately?

2. Duo queues and the other players People know that duo queuing also effects this (reason 1) Honestly I don't understand why you would punish players for duoing; because they are playing with friends which means better overall skill and teamwork. What does a higher rank mean? Better overall skill and teamwork. Of course duo queues should have an advantage; if they can destroy the competition then they deserve to be shut down by higher ranking players. . . when they get placed there.

3. Picks and Bans I don't see picks and bans having an effect on the game; lately it's become just a tool for banning what you "don't" want to play against. But never have I seen bans prevent 5 man ultimate team comps from rolling around, or preventing the steamroll comps from coming into play. Imagine how league would be if team pick and bans . . went mid-way through champion selection (tournament style).

4. New players in ranked Where would you place new players in ranked? 10/10 wins doesn't necessarily mean gold nowadays. And smurphs obviously shouldn't be able to magically bounce into the gold division just because they made a new account/illegal means

5. Off-meta, low win-rate champion picks Kind of annoying when you see champions with extreme low win-rates being put on your own team.