Are they, though? Sure, some of them lost. But there are others that will only get stronger if some competitors are eliminated (a point also made by https://news.ycombinator.com/item?id=25957142). And even the ones that lost big so far can get back into the frenzy. Buying on the way up... or shorting near the top.
Here is my take on the "irony" of the situation: Hedge funds can make money off of stocks they believe to be overvalued. So the WSB activists handed them... a stock that everyone knows to be MASSIVELY overvalued. Yeah, that will show them.