Matchmaking is broken?

Last few months, my matchmaking has been terrible. Not just a couple games with bad teammates or unfortunate enemies but every single game now. Not sure what the problem is but i am constantly stuck in games where the teams are so impossibly imbalanced that i cannot win most of them. Or the matches are a complete stomp without any chance of defeat. i looked into the matchmaking system(what little i could find) and, according to riot. The matchmaking is based on win and loss. You get points for winning, and lose them for losing. Simple enough that the whole thing topples to one side. This system transcends all game modes including the events. Like URF. Admittedly, i'm an URF fanatic with over two hundred games in the last two or three times it has been up. Rough;y 55/45 win loss. Matchmaking does not matter in URF as anyone can effect the game. I do not know if URF changed my matchmaking and scattered everything but whatever the case, it's unplayable now. Every solo game for the past two months has been predetermined. I hop into some matches with gold and plat friends. Instant change. Every player was about as good as every other. i didn't dominate didn't fall behind. Won as many as i lost. games were decided by one lucky play, continuous struggle, desperate guessing, chaos, perfect. i didn't know where anything would go and i couldn't hope to guess cause there were comebacks and sustained wins alike. In solo play, i see anything from pre level thirty(growing more common with alarming regularity) to mid plat and level three hundred eighty. I get rank and level don't mean much, but it does indicate time spent in game for level, and time committed to ranked. To a degree. But pre level thirty next to two hundred thirty is pretty weird when they aren't even grouped together. Iron and bronze against silver to gold is pretty difficult to understand. I might be making a fuss over nothing but i can't play the game if i have to have a five stack every match. Can only handle so much of the same dude repeating ez over every kill. (He's fun but an idiot lol). I don't want to play predictable matches on my own that drag on for a half hour to an hour with the same result so clearly in sight. I also don't wanna wait for URF to come back because it's the only game mode where this kinda match making is actually beneficial with weak enemies to feed off of and equal or stronger ones to challenge. Riot needs to review it's match making and revamp it because a pebble and a grape are the same size but they don't belong in the same salad. Bizarre enough to say but i think it's clear enough, probably.