Why the Hidden MMR system is flawed as a GM player

So currently I'm ranked in the top 100 and I've been as high as 7500 points this season. Every single game I play I am banning because my MMR is very high, no matter what my actual rank/points is/are. This makes it very hard to climb back to high ranks because unless there is somebody with an equivalent hidden MMR, the game will try it's hardest to balance the game resulting in actually imbalanced teams, because the nature of this game is very team oriented. Seemingly a lot of pros run into this issue as well(forcing them into smurfing to actually enjoy HL). It makes it very hard for them to climb once they hit master, as usually their hidden MMR is around top 5 GM so teams get stacked vs them and it doesn't really make for a fun/competitive environment. I'm not exactly sure how to change the system but it's honestly a joke that teams get matched based off their hidden MMRs and not their current rank. Isn't that what placement is for? The point of this thread is to bring attention to this clearly flawed matchmaking and discuss idea's to fix it (I know this only applies to a very small part of the population but it's very frustrating and a flawed system.)

TLDR: please fix the system the game isnt fun when theres 9 masters/gms in a game with 1 plat