Though it isn't as bad as Suicide Squad Kill The Justice League it was still plagued by a horrendous monetization system which is unfortunately common in free-to-play titles. Either pay through the nose to get the characters you want, or grind for it like it's your full time job.
Though the inclusion of Samurai Jack, The Powerpuff Girls, and Raven were great on their own it still wasn't enough to save this freemium game from its predictable fate at the hands of Warner Bros' AAA mismanagement and David Zaslav's malicious greed. Honestly they should've been left out of this entirely to spare them the trouble live-service games causes, though it was reassuring that the Girls along with the Rowdyruff Boys (as a skin) not only got their original voice actors back and also were characterfully improved from their horrible 2016 rebooted selves.
Given the massive commercial flop I can see Player First Games, the developers of MultiVersus to be marked for shut down given WB's greed.
I honestly never really gave MV a chance, it just didn't hit me as much while the controls and mechanics were clunky and nothing like Super Smash Bros at all. Plus I hated the microtransactions and the grinding aspects of it. Though it was a treat to play as the Powerpuff Girls and the Rowdyruff Boys it wasn't enough for me to keep playing.