What's going on with match making?

I am bronze 3 and I've been playing for about a year. Recently I've been matched against better and more experienced players. Just yesterday I had a enemy lee sin with 3k wins and a higher rank. He proceeded to stomp us and bm all game. The few games before that I faced a plat top lamer. It's becoming unfun to get stomped. Most of the time these guys go full try hard and dominate a game. Granted this is normals were talking about but I still feel the match making has been screwing me over.
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