> This sounds like just another way of saying "I don't like your conclusions, but I can't see a good way to refute them."
No, I don't think so. It sounded more like "your conclusions are not new and wrong, but to refute them would require more effort than I'm willing to invest in replying to a rando's internet comment," which is a totally legitimate stance.
It's sort of like coming across someone in a forum who claims to have invented a perpetual motion machine, noting that they lack fundamental knowledge, but declining to volunteer to be their Physics 101 teacher.