I'll give you a couple of three advices. Not your keys, not your coins. If you can't hold it, you don't own it. Don't invest more than you could afford to lose. You pretty much violated them all. On the top of that, bitfinex is a crap exchange. You should have tried binance or some other (relatively) better exchange but you still shouldn't put there big amounts.
I agree with you. If I had used an Electrum wallet instead of Bitfinex I wouldn't have had any problems.
When I opened this issue, I had $30,000 in my account, now it has decreased to $25,000. Even if Bitfinex let me withdraw it today, I've lost $5,000.