I think I should point out that revenge threads are not allowed. And recommending that you beat the shit out of someone can get you banned on here.
To answer your question OP. You had to pay 1 month salary just to learn NEVER to give your CREDIT CARD to someone. That guy might be an asshole but he obviously saw you were weak willed and took advantage.
I have 1 very simple rule in life. I NEVER LEND MONEY TO ANYONE. I never take loans. Don't allow anyone to take loans from me. I've had people ask to use my phone in public and said no. I've had drug addicts approach me in the middle of shopping to tell me a 3 minute story, how their mother died months ago, they have noone, no car, and just need "whatever possible" for food or a taxi lol. But if there was 1 thing I learned in prison it's that most people who do that shit are either drug addicts or predatory assholes.
Especially asking a friend for money. If it's a good friend, they left their wallet in the car, etc... I'll just buy them a soda or w/e. But you have to be a special type of asshole to ask a "friend" to borrow their credit card. The fact you actually GAVE IT to him..... you gotta hold yourself accountable dude. That shit was your fault.
-BB