I've read about what happened to BTC - what is stopping something similar happening to BCH?

I wasn't involved with the whole block size debate and split in 2017 so I don't have direct experience - although having read about the scaling debate and what happened, it really does sound like there were powerful vested interests limiting the true potential of Bitcoin. My question is IF Bitcoin Cash becomes successful in gaining further on BTC (which to me looks likely...) then what's stopping similar vested interests launching a coup on all the communication channels, spreading propaganda, corrupting the protocol and ultimately turning BCH into a shitcoin?

You can already sometimes see what looks to me like saboteurs starting to campaign for turning BCH into a Proof of Stake scam coin... I guess that way it would no longer threaten BTC's status as the reserve crypto.