I agree with REO about the orbs. Since I don't believe they will patch the game and only hotfix, there is only one thing I can think of that would make MMH a bit more fair without killing him. When he gets hit, the orbs on the screen disappear. That actually may take a patch though now that I think about it.
BUT.. I have been in the FGC from the very birth of the arcade fighter and to call so many of MMH's tools "broken" is actually false. TBH, almost nothing that is considered "broken" in this game is actually broken. Only broken thing about MMH is how he uses interactables. He gets a guaranteed OH Teleport mix up from hitting you with an UNBLOCKABLE object. The interactable itself will do between 16-22%, then you have to take the safe mix up which leads to a 40% combo. Too add insult to injury, when near an interactable MMH can hit you with a 40% combo ending in MB Phase charge, giving him the interactable guaranteed. The interactable gives a hard knockdown and grants an OH Teleport cross up mix up for another 40% combo if you guess wrong.
That one scenario is probably the ONLY actual thing that is broken. The rest of his tools are just really powerful/over powered. However, being OP doesn't make you broken, it just makes you a really good character.
