Bittrex used to be one of the best exchanges there is within the market, but now they are just simply getting worse by the day. Unlike Binance, Bittrex is not forced by any regulatory pressure for it to behave the way it is right now, so they are basically just screwing customers over and trying to play the long game for people to just give up and hope that they end up with the users fund. Also, the proof of source of income they are asking on exchanges for additional KYC documents is simply too invasive, and is not necessary IMO because that's not their business to know where I'm getting the money from, it's just their job to accept it and let me trade. These kind of information should only be given to law enforcement if I end up screwing and made something illegal, not when I'm doing something for my own gain.