Matchmaking Rito, fix it

​I am silver. I have won a lot with my duo in ranked, so my mmr has been quite high, but I have been in multiple games with diamonds. That I understood, with our wins and our combined mmr, maybe a diamond sneaks in there every other game, despite me being silver. But how does your matchmaking think that me in solo queue can win a game against a 3 plats (1 of them was gold 1 with 100 mmr and 2 wins, so that counts.) a diamond 3, and a silver. All I had was 2 unrankeds, a silver and a gold. The matchmaking has been getting worse over time. My brother went on a huge win streak and is in platinum now and hasn't played against a diamond yet, but I am just trying to hit gold and I am playing against diamonds. Granted, if I am playing at that level, I am fine with being matched against it, but I am still not quite there yet, I would like my rank to reflect my skill level, and I deserve teammates just as good as my opponents in situations like this. Just a thought.