It's strange how all the other favorable comments don't mean anything anymore when one negative comment pops up, isn't it? Trust me, the nice comments aren't there because those people didn't want to hurt you, I'm sure they were honest.
I'm having a hard time when I get comments like that too, hasn't happened to me on pbase yet but elsewhere. Especially comments that seem to target my whole style of photography can get to my heart.
But I think that's exactly what those people want. If he wanted to give you constructive criticism, he would have done so. That's not what he was after: From a rational point of view, that comment was as unhelpful, amateur, and pointless as it gets.

He didn't tell you what exactly he didn't like, he didn't point out to you how he thinks you might improve, he wasn't specific at all. Absolutely no constructive criticism here.
Conclusion: This was just a dumbass trying to get attention. At least in that he succeeded.
Antje