I don't see anything mean in the comment, and I also fully agree (it's really well-stated). Being direct and not mincing words is not being mean.
> At best your typical crypto project is just a planet-destroying unregulated casino, at worst it's criminal fraud
Obviously the "at best" part is still a negative, just like the "at worst". That's no way of starting a curious conversation and frankly, it makes for boring reading no matter if you're for/against cryptocurrencies as a whole.
I don't understand what more there is to say about NFTs but maybe I'm just taking crazy pills.