Discussing how riot should Avoid having to ban players.

Well in my most recent game I was banned for 14 days for toxic behavior. Also i have received the first 2 Offensives , making my next offense a permaban. But what confuses me is how This matchmaking is done. I mainly play Norms and i really only do Ranked with friends or if i feel like playing it but most of the time i do Draft/Blind pick. But what i noticed is that in my blind / drafts i'm put with some players who aren't even level 30 yet , And even if its not ranked they should at least have the decency to put me with players who are at least near me skill wise. Also the matchmaking gets even worst , its as if you don't do ranked flex/ solo/duo They literally put you with the most random leagues ever , In my recent games they would put me with Bronze 4 and 5 with most of them having low lp While I just finished my provisional games and i got silver.
It just seems like Riot loves to Shame Toxic players then they create scenarios where it would be normal for any normal being to get aggravated And it pisses me off Because this is my first season playing and Some players even say its good to /Muteall in your games to avoid being toxic, but then you get reported for not communicating enough with your team, Even with the new pings you cant tell your team everything. It just seems to me that riot bans / shames toxic players but then doesn't go out of their way to avoid them

By the way the link to the game i gave you is the one where the teams are completely unbalanced and most of the players have 0 to no relation