i think its foolish for people to bash you guys for not liking the demo/game. I personally just wish you guys would elaborate, and also keep the concept or "what can actually be implemented" in mind. For example, people have ragged on madden for years because either they failed to hit the realism levels that the very old nfl2k games were reaching, or because they would add new features just to remove some other features, and then reintroduce those features as new (2k is doing this with crew right now, and i have a few ideas as to why)
So its fine if you find something unrealistic, and it turns you off, but explain it, try to explain how it could have been tweaked or changed, dont just point out that foot planting wasnt 100% real when no sport game has really figured out how to do that yet.
Also its always a good idea to present what you do like about the game. I refuse to believe that there i nothing you guys enjoy about 2k13, and if there really is nothing you like about 2k13, then at least mention things you have liked in other basketball games (2k, live, whatever) so at least it makes your argument more relatable, more understandable, and seemingly less trollish (even if its not your intention, simply saying negative things and calling them 'truths' is essentially trollish behavior)
I for one enjoy reading the real negatives on a product. The best products, to me, are not the ones that have the most positives, but the ones that have the least negatives.....and when it comes to games like 2k13, i like to look into how many of the negatives are true negatives as opposed to user misunderstanding....