A breach of fiduciary duty" describes Matt's behavior through all his escapades here. Minority shareholder rights are a thing, it just seems there are no minority shareholders willing enough to deal with Matt's nonsense to fight for it.
If there is any litigation, it opens Matt up to liability for the same thing. Unfortunately, as we've seen, Matt is willing to self-destruct himself and the company if it would effect sufficient self-glorification for him.