This has the distinct flavour of QAnon esque conspiracy theories.
QAnon requires you to believe absolutely insane stuff, like Anderson Cooper drinking the blood of babies. This theory would require you to believe that enormously wealthy entities would find a way to use their influence and their knowledge of the inner workings of the stock market they know like the back of their hand to prevent themselves from losing a metric shit ton of money.
I'm not saying it necessarily happened, because it would still be awfully hard to hide your tracks and there'd be hell to pay if you failed, but those two conspiracy theories are definitely on different levels of 'hard to believe'.
There definitely still are people that expect the "rocket to start any minute now", and a lot of those might also believe that they were stopped from making a ton of money by evil forces -- that might be loosely comparable to a cult like QAnon. But that doesn't mean that there aren't some reasonable questions to be asked about the strange occurrences on the stock market last week.
As far as strange occurrences, I doubt we’ll ever have a satisfactory answer given how much of the market is now run by black boxes.
I mean, it was not just about GME now. If it worked out, it would happen again. Now everybody knows .. the big guys just allways bend the rules and you have no chance, so you don't even try a second GME.