Why are so many quick to be a harsh critic?

Alexeiv
For a good half of questions posted, not just here but all over the vastness of the internet I constantly see mass backlash on the part of people who answer. With a condescending tone and harsh criticism.

Life experience has taught me a good chunk of people lie and talk behind others backs, do illegal or questionable things and are outright hypocrites.

Yet so many step up to appear righteous.

To my actual situation, every time I bring up that I'm helping my girlfriend lose weight I hear people saying " You should love her for who she is " and " don't try to change her ".

It's my girlfriend, we both love each other and I'm more caring and reliable than 90% of boyfriends out there, don't believe me? Try me.

Yet people judge me on my actions and my ideas and call me a " jerk " or " prick ", etc.

I tell them to go lick a toilet and I even say it in the nicest way possible.

I guess I'm rambling as it's late but it agitates me to no end.
Why are so many quick to be a harsh critic?
4 Opinion