I do not understand why that incident would have caused the results the OP said.
Tis not a good thing that happened but the end result was not that horrific.
I've been jumped while skateboarding and had the snot beat out of me. Did I stop skateboarding? No, that is until I realized that I sucked at it.
Someone pulls that kind of crap on me my stubbornness will kick in big time. You quit and the asshat wins. End of story.