Here @kissane has recommendations for how Mastodon can be better.
Personally, I believe that Eugen has done the best that he can considering the circumstances. Nobody could have been prepared for November’s Twitter migration.
But I agree that maybe it’s time for him to give up the “Benevolent Dictator For Life” thing. Mastodon now needs to scale for the next 90 million users, and that means needing to delegate authority.