I think all of us were in bad situation with wrong timing, or bad investment. Learn from mistakes and push forward, complaining or any kind of negativity will confuse you and you can just make more mistakes. Keep your head cool whatever happen!
It`s why I always point out similarities between trading and gambling. 20-30% from your deposit is nothing, if you have more to deposit. Bankroll management is the same in gambling and trading, you can`t gamble or trade with all your bankroll, it`s suicide, you need to know how much you have and than make strategy that suits your bankroll, after that you make deposit.
Losing 100% from deposit is nothing, I just deposit the same amount again, if I lose again I double or triple my deposit. Not because my bankroll is huge, it`s cause I deposit maximum 10% of my bankroll in single trade, or single game, and I always have for more trades and games.