I disagree with that viewpoint. While you probably would find a person's first remix to be the very definition of amateur, that doesn't necessarily mean that person's review is unqualified. If you listen to enough, and experience a wide enough variety of a kind of music, you eventually become qualified enough to review that type. Most music/movie critics aren't directors or musicians themselves, or at least are very unlikely to have ever had critical success themselves. Does that mean their viewpoint is to be discarded since they don't do it themselves?
Fallacy. Personally I've only remixed things I wouldn't show anyone. Hell I'd kill to keep them from ever being heard, they're THAT BAD. But I've got pretty much every song from this site (um, I swear to God I intend to donate reallllll soon DJP!) and a shit-ton of wips, and remixes from other sites, etc, and I consider my own opinion at the very least informed, if not refined to the level of the talented remixing reviewers.
Just my two cents on why his opinion may be different from your's it shouldn't be discarded simply because he doesn't have anything on the site. That sort of argument is begging for comeuppance should someone you throw it at actually have credentials you aren't aware of. Instead, simply say "I disagree with what you said", which translates into internet-speak to mean "I don't know how you can say something so stupid with that much man-cock in your mouth."
Yeah I understand what you're saying, but in this specific case, it wasn't just that he was giving the song an unfavorable review. He went way beyond that and was using expletives and debased imagery so as to try and destroy any semblance of worthiness within the remix. That's not a remix review, that's just remix bashing, and it's uncalled for, especially when the song is this good. That's why I'm saying he has no right to say the kind of stuff he did without having the balls to try and remix anything himself.