What actions makes a man appear cowardly?

I'm on probation on here because I called some people out - people who were actually rude, mean, dismissive. and when I spoke up, I got called a coward. typically I'm passive aggressive, sad trait and habit of being an introvert. the one day I speak up and speak out, because I didn't do it calmly and/or politely - every good deed I tried to do to help them, gone. not a victim. it was just sad.

*downs a shot, pays tab and leaves* have a good night