It does hinder the bitcoin (and cryptocurrency) ecosystem in general. People getting scammed by scam coins/tokens and the publicity of the news about the scams are getting gives people a bad impression of bitcoin/crypto. So it does slow down adoption to some degree in my opinion. Long term though? This will probably be irrelevant. Technology moves forward nonetheless.

Legit altcoins though? Probably not. Not a single altcoin that's focused on being a store of value or for-payments is close to bitcoin in terms of adoption and security.