Ever felt like giving up?

Feeling real stupid today. Yesterday I aloud my self to be terminated from Jasons Deli. A part time job I've held for 3 almost 4 years. The new management came across to me as disrespectful and rude and on top of that the ongoing problem of bullying in the workplace continued to persist. I got so pissed yesterday when the lady gave me a "write up" for my inability to wear the "right shoes" and the lack of compassion and fairness she's showed since she replaced the previous store manager. I was just angry and I had a lot of hate towards majority of the staff because of their disrespect. So on my way out I called the bully's a bitch and I also called the store manager a bitch (unbeknownst to myself, that's how angry I was). The manager heard it and loudly questioned me about it. I honestly could only see red and my ego is so fucking high that humbleness isn't even an option. I told her that she had enough leverage to fire me and I told her that I called my coworker a bitch (I didn't realize until afterwards that I called her a bitch as well) she fired me and I caused a seen. Called everybody a bitch made some racial slurs changed in front of the store making sure they could see my undergarments and threw anything that had to do with Jason's Deli on their floor then left. Immediately after, like always whenever I get upset like that, I felt complete remorse for my actions. I feel like shit, I know I'm some shit, and I really wish I didn't let other people's slightly bad behavior make me turn into the scrawny hulk. I feel pathetic, how will I succeed in life if I don't know how to communicate with people and stop letting this anger I have get the best of me. I come off too strong and that's why now not only does everybody hate me, and I have absolutely no friends, I'm jobless. I really just want to disappear, the world honestly will be better off. I do absolutely nothing to benefit humanitie. I'm the literal definition of a disgusting looser and no matter how hard I try I won't change. I'm just going to give up and go, I'm done.