While this is all true (and realistically Robinhood has killed their brand and probably won't survive), those same users were also suckers for falling for this ridiculous GME pump.
What Robinhood did was absolutely in self-interest, but it was trying to cover up a mess that fundamentally wasn't of its own devising. They were either going to get sued by a bunch of people that got fleeced in a clear pump and dump scam or they were going to get sued by users they prevented from losing money, and they chose the latter.