A very good example of this is WoW.
People are always talking about back in the good old days in Vanilla. But while the game actually was in Vanilla it was more or less a beta and people complained about more or less everything.
For some reason the "good old days" are always better when they are the "good old days" than when they actually happened.
Don't expect to get anyone to listen to or think about your comments when you trivialize the opinion of anyone who happens to disagree with you. Intelligent people can reasonably disagree on this point, so you claiming that anyone who sees it differently than you do is just "nostalgia" is not only disrespectful, its plain factually incorrect.