It's their shame for not going further into it, really. There would be lots of people angry about it, but they will learn their lessons and improve upon them. Others would claim crypto to be a scam and leave it at that, for those who are willing to learn and master it.
I wonder why anyone would think crypto in general is a scam cause of some projects that failed to keep to their promises, what i think is that lately people fail to pay attention to details and lots of people would fall victims to scammers especially on telegram, cause they don't make research but jump into any project at the slightest opportunity they get. I've also noticed that after Notcoin launched many telegram users who didn't take it seriously pre launch have taken it upon themselves to participate in any airdrop they come across not minding if it's a scam or not, those are the type that would end up saying crypto is a scam when they finally get scammed, I don't feel pity for them anyways cause they need to learn their lesson and improve like you said.