I imagine it stings yeah, but as you note you've not been overly punished. It's a good lesson for next time to not get too crazy about the hype for the next big trade
What's the activism though? People bought this stock to make money, plain and simple; especially those who invested thousands.
There's really no way of knowing if the short sellers have actually got out and covered themselves already. Yes they got greedy but these billionaire hedge funds didn't get to where they were by accident, they are experts and there's been an incredible amount of volatility in the market.
They might been able to utilize this volatility through calls or buying stock themselves and then manipulating the price downwards to cover themselves, we simply don't know