Matchmaking is big garbage

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You can check some of my games - i, proud gold 4, play against diamonds/platiniums on normals. like 90% of my latest maches end with surrender, i cant do a shit. There is no fun in any way you can look at this, i got challanger in one of these maches, i got two grandmasters in enemy team of course. How am i supposed to win these games? How am i supposed to have fun playing this shit? Please can someone repair my game
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