Multiversus was one of the most mismanaged projects I've seen. Released in open beta for months, shut down for a year, re-released as literally the same game but worse and with more microtransactions, then quickly died.
Shame. It was fun to play for a while.
Fixed that for you. The problem isn't the casual players, it's the people spending $500+ worth of skins and battle passes on one game. Those are the reason GaaS are so successful.