All this suggest that the exchange is scam and you shouldn't ever use it again. Check out the negative feedback on their profile
does this thread also suggest that they are a scam?
I'm not want to defend them here, but only two hours after the opening of this topic, OP posts that problem is solved. the case happened that their support did not work on weekends, perhaps OP reacted a little panic however, it is a slightly larger amount of money.
Most of all accusations which you posted coming from Newbie without proper evidence. they implement KYC because of legislation and it was obligatory for them if they wanted to continue working. Especially for European users.
Yes, it is true, they listing all altcoin/token without any without checking whether they are regular projects or are fraudsters behind it.
I use this exchange for some shitcoin, and I must say I never had a problem there. Also some swaps there they were done without a problem, although I even gave up some altcoins. no matter, I would never hold 0.5BTC on this exchange.