Unfair matches

Making the jump from gold 6 to platinum 6. All was going great until I hit the last 50 games of platinum 4. All of a sudden every matchup(bonus or tourney) is against a diamond team. Some of these matchup the opposing team is 30 to 40k better than mine. I have most of my players at least platinum 6 with a few capped. Anyone? I've lost 20 in a row cause it's just not fair. Playing since 2017, went to diamond every year never had this problem.