How do you counter overleveled people in midladder?

I have played for about 7.5 years and spent a small amount of money, but even then, I still face level 15 wizard, sparky, minion horde, mk, balloon, dart goblin, ebarbs, rage deck every other game it feels like. And then I'm underleveled, so I can't win no matter what I play. I've tried meta decks(2.6, logbait, lavahound, bridge spam, etc.), the highest leveled stuff I have, and playing midladder stuff similar to what I play against. It never works, and they bm afterwards like they're good at the game. And before people say "oh that's a skill issue", shut up.