Matchmaking is stupid.

I'm unsure about what's going on with matchmaking but it's been absolute cancer lately. Every single time I go botlane in normals I meet a support with Mastery 7 and above 100k mastery points, leading to them mowing over me and my (usually) level 30-70 support which somehow lands in my games despite me being an ex-silver player (haven't bothered with ranked yet this season, it looks so cancer) and level 144. Every single time I see an enemy Thresh, I literally bet with my friends that he's going to be a Mastery 7 and play very aggressively, scoring easy kills for his stupid ADC. And every time I win that bet. The issue isn't even always in the botlane, I just went up against a stupidly experienced Gangplank yesterday when trying out Toplane. I understand that my normal MMR is low due to how much fun my friends and I have and didn't really care about losses till just this year, but it's gotten to a point where I'm stupidly fed up of this. Been inted 2 times already today with a Kindred in my teams.

People main champs and roles, I get it. But for this to happen literally every time, with the enemy being so much more experienced than me, is just demotivating. Riot used to encourage diversity.