Two positions on this:
1) I know there are some out there that are quick to trash products. They'll send angry/insulting letters jumping on people's work. It's unfortunate, and I think everyone here agrees with that assessment.
2) I've also seen cases of end-users giving constructive criticism such as "hey, this gauge isn't working right" or "You forgot x thing on the aircraft (x being a rather significant feature)". Despite attempts at civility, this is still met by some developers with "wahhh...quit persecuting me and my work. I attempted making it, isn't that enough?"
Some end user comments are certainly inappropriate, but I've also seen developers quick to play the "I don't make mistakes. Why aren't you happy with what you have" card.
If we can't politely and constructively push for realism, accuracy, and increasing standards, why bother?
My attitude is, if you are going to go through the effort of making something...make it right, make it good, and don't "cut corners" and use the excuse of "well, I put time into it, isn't that enough?"
I don't think anyone here or elsewhere is hung up on literally the exact number of rivets or how light reflects off of a surface at this and that angle, or on gravely unrealistic expectations.
Most criticism I've seen aired publicly relating to various freeware and payware products is valid, and is able to be accomplished.
Some of the logic that I've seen lately dictates that I could go out, spend 30 minutes making a literal tube with no distinguishing features in Gmax, call it a Boeing or Airbus plane, and....since I put effort into making that tube...others do not have the right to heavily criticize my work. After all, I put effort into it, and made it to "my" standards, isn't that enough?
Standards are being raised as the sim evolves and more and more percieved boundaries are pushed back. We cannot make effective new aircraft "simulations" if we are happy with the quality standards of previous sims. If one can't and/or won't adapt their workload to higher standards, and/or is emotionally fragile, they're in the wrong industry.