What is your level for standards and how much do things need to change before you change your standards as well?

It seems that as time passes, people tend to forget and abandon whatever standards they used to have. We seem to be born to this world with standards of immensely high altitudes and then slowly lower them till there's nothing left. In short, we never raise our standards as we age, we only temporary put them back closer to what they were.

For example, as a child, we automatically assume that everyone is good and pure and holy and saintly and whatnot. Then your parents and that nosy uncle tell you not to take candy from strangers. Then your friends tell you not to give money to that begger because he'll just buy drugs and bug you for more. Then your girlfriend tells you not to look at other girls because... well... apparently because they're cruel malicious beings of a diabolical nature.

As time passes, our definition of "good and pure and holy and saintly and whatnot" changes to a level that would have been "inexplicable cruelty and evilness" when we first existed (I doubt our brains at that time could have comprehended such a level anyway). Thus, our standards deteriorate.

I don't care about that. That's a fact of life. What I'm worried about is how people change their standards for the most ridiculous reasons. Subway made one bad hoagie? Man, I'm never eating at Subway ever again and will protest because they universally suck balls for life dudez. You suck at art? No, apparently I'm damn fucking awesome at art. I'm so damn awesome at my super awesome stick drawings that only people slighter better than me are awesomer and everyone else awesomer sucks a level of sucktitude only I can see.

People are naturally adapted to denial it would seem. Naturally adapted to justify everything they do as "the best" and resent everything else. I guess that's what ruins everyone's standards.