Are humans are more likely to be too hard on themselves or too easy? Why not just tell one another why/how much we appreciate each other?

Truthfully honestly and specifically why. It would only apply to those whom you admired. Not at all about those whom you didn't. Whatcha think?  Do you regularly tell the people in your life how much you appreciate and them and how grateful you are that they are in your lives? Do people you too? Shouldn't we spend time doing that rather than attacking insulting those we dislike?