A word of advise:
You can try to change everyone else, or you can try to change yourself.
I'm well aware that comments on this site can tend to seem hurtful or sarcastic, but quite frankly it's been that way ever since I joined. The funny thing is, the people that tend to be the most common "offenders" of that vein also tend to be the most helpful.
All I'm saying is that you can either choose to be offended by how someone offers you critique or advise, or you can choose to mine their knowledge for everything it's worth and learn from it. It's far more likely that you can adapt to the attitudes on this forum than it is for this forum to suddenly change the way it's always been.
As a postscript, there's a reason that the most helpful members on here also tend to be the most sarcastic. When they take time to give detailed, thoughtful critiques, it's often rebuffed by the original poster in a way that makes it obvious that they're not really paying attention. In other words, the original poster takes offense to those measured, carefully worded critiques as much as they do to the harsh, tactless ones. They respond to the positive comments with, "Thanks!" but refuse to acknowledge the wealth of information provided to them by some other person simply because they didn't like what they said.
Simply put, in coming here, it is your responsibility to learn from whatever responses you get; it is not the responsibility of the other members of the forum to hold your hand and lead you through the learning process, though if you stick around, I think you'll find that in their own way, that's what many of them are doing.