COSS were truly terrible at one point. I bought COSS when I bought KuCoin, around October last year. Recent COSS users can't understand why I hate COSS, but I promise you that that exchange was on the verge of death. It's a long story, but I lost a ton of money on COSS because the exchange became almost unusable and I had to make big sacrifices to get any money out at all! I'm never going back to COSS.