Can we please have a discussion about the Matchmaking system?

In the new season we will probably get a soft MMR reset or maybe even a hard one. High ELo will play with lower elo, same procedure as every year. but even right now, Games in my Gold elo are either stomps or 50min games because people don't know how to close the games. And that's fine with me. But at the moment i am having regularly games where i get Silver 3 players on my side of the team and get matched against platinums, who completly stomp Silver players obviously. Same happens with unranked players i suddenly have in my games after getting to mid-Gold. If the person is not a smurf or has a ton of normal games, it is very likely that his skill does not really equal Gold players(yes i know that it's low elo, but still), which makes the game unpleasant for most other people in the game.

Another thing I'd like to adress is, that i've seen the worst players in Silver and the average skill of a high Bronze player with many ranked games is higher than the one of most Silver players i encountered. And the match making system is there to sort players.

Lastly, the amount of LP gained or lost seems to differ a lot after having just a couple wins/losses. I don't want everybody to suddenly have a Diamond border and League, but maybe Riot could think of making another League in between Silver and Gold or i dunno. But in my recent ranked games, the skill difference between certain players is just too big and not a pleasure to watch in most cases.