I am a parent of two children and I find this comment highly offensive. My kids are only 4 and 3, but we constantly try to teach them about responsibility, working hard, studying, being a good leader, and what it means to be a good human being. Am I a perfect parent, absolutely not. Will my kids understand what respect is and that quitting is unacceptable, absolutely.
At 4 my son already can explain why we fought the British in the American Revolution. I promise you by five he won't ever make the mistake about who bombed Pearl Harbor. Our history is important, take some time to learn it, and and try to learn something about respect. Certainly parents, not of my generation, would have taught you taking anonymous cheap shots on a message board is disrespectful. If you are going to call some out like that, at least put your name on it.