I have no such extremely scary exchange experiences, but I suffer from liqui because of high withdrawal fees, it is also very silent exchange that scares me.
Then move your funds to bigger exchanges (Bittrex and poloniex, but make sure you have verified your account first or you won't be able to withdraw your money, Binance (my best choice), you don't need to di Kyc on here).
I myself have experienced problems with large exchanges such as poloniex, a few months ago poloniex experienced problems with withdrawing and happening to many people. I did DGB withdrawal but they didn't finish it. more than 5 months my coin was not sent. I submitted a ticket but there was no response. I'm sure some users have experienced it.
I think Poloniex not like in past, maybe because there are larger user that trade in there. But now their support is lack of responds. That is why it will be bad if we have problem especially with withdrawal. Luck i still not get that experience yet.
Poloniex used to be one of the dominant trading exchanges last year. If my memory serves me right, it likes around mid year last year that they became sort of very slow in responding to user's issues and then it went from good to worst in just the next couple of months. They blame the sudden surge of crypto traders, so they wasn't able to adjust their business model that time.
Just a few minor misses for me in HitBTC but it was resolved in matter of weeks. Yeah I know resolving a issue in couple of weeks in not good but I still trade with them.
However, most issues though come from exchange will few thousands of users that's why I stay out and doesn't want to do trades with low volume exchanges. The change of you having issues is very high and they might pull a scam stunt in the end.
Most of us had withdrawing problems on the internet, that is not a big deal. It happens even to the best sites, some network problem or anything else, most of sites solve that problems after a day or two. With yobit I waited almost all week once, they had some problems, but I didn`t cry about it, and I don`t think it`s the worst thing that can happen with any site.
Exchanges make profit from users, more they have more money will they make, I never had big problems with exchanges cause I was always honest, I never scammed anyone, why would I have some major problems with any site? I think people who had big issues with exchanges tried to do something wrong and when they don`t succeed they cry how site is crooked, and rigged, be fair and you will not have problems.