Scumbag isn't the right word, you live and you learn and we ALL make mistakes. Just take this as a learned lesson and apply it to the future. I'd much rather a friend tell me he made 100's or thousands and i missed out than a friend tell me to get in because he heard this or that and then become a lifetime bag holder. We have ALL recommended stocks before, rarely does it turn out great.
Anyways, no need to beat a dead horse, good luck whereever you go next