Funds were less than 2 min on Mexc after funds being tradable (that is my mistake I guess).

Ooh.. yeah, back then i was doing something exactly like that on Binance, so that might be it. But your experience is waay worse than mine. 6-8hrs? each time? jesus. Binance at least made it under 1hr if I remember well (might not, long time passed). In their terms-and-conditions they reserved more time (days?), I don't know, maybe I was just lucky.

I know KYC and anti-MM rules and why they are required and all, but with exchange rates changing so fast sometimes, it's ... just awful bullying and forcing risk of loss on the customers. I hope it won't happen again on your new route :)