Okay, maybe it was a little tacky. But the decision itself wasn't too not-tacky either.
And it is certainly constructive. If anything, I'm saying "I'm not satisfied". As a customer, that should be of, at least, a LITTLE importance to him.
And I only pointed out mistakes that were non-subjectively incorrect. Like moments where they charted two vocal parts on the same note when there was a third harmony (what's the point of only charting two melodies if you have 3 vocal parts) and where different notes on 5-lane instruments were represented as repeated bricks. Or notes on Pro Keys that were just flat-out wrong. Those things are undeniably wrong.
And it's not like I was saying "Oh, wow, you suck", I was pointing out overlooked mistakes. Mistakes that, in my opinion, shouldn't have been overlooked. (considering I noticed them on my first view of the video)
While I can understand a defensive response to that sort of criticism, as a business working in a world of competition, I think making mistakes and ignoring criticism is a really good way to LOSE business.