First making a list of exchanges to avoid based on just couple of user experience is not the right way to do it . I will say my experience with exchanges post by users .
1. Hitbtc, truely a shit-exchange where withdrawals can take weeks or even months. They also have no support team you can contact and charge deposit fees.
Hitbtc had bad experience for couple of months specially with ETH deposit/withdraw but I heard they are working without any problems right now
2. Cryptopia, deposits will take hours to appear into your account and withdrawals can take hours, weeks or months.
I agree with this .
3. IDEX, not sure if this falls in the exchange category but this thing is fking slow. You can't withdrawal your tokens without having $50 worth of Eth.
They do have no minimum to deposit but a minimum to withdraw . So I kinda I agree with this
4. Etherdelta! You should avoid it because its really complex to use and you can easily make a mistake.
You can avoid an exchange because it is complex but you can not put it on shitty exchange for that reason !! . But ya they are shiity and have broken UI that will make you lose a lot of fee . I use Etherdeltafork better .
5. Exmo! Withdrawal of money hanging confirmations to the mail simply doesn't reach, support said most likely spam filter, suggested to change the registration mail and at the same time it requires more than a bank when registering a mortgage, the verification was two times on exmo.com and exmo.me
Never used so have no idea.
6. C-cex, You can put C-cex exchange on your shit list. I used it before. These guys are on new year vacation of 40 days. until those 40 days, they suspended all withdraw. How can an exchange go for a vacation of 40 days They have listed mainly scam coins such as MCAP so guys stay away!!!
Never used so have no idea.
7. Poloniex, I'm avoiding poloniex because I stuck on this exchange for few months with all my depo while crypto was growing) Support just take silence pause and that was very sad for me)
You did not say why your crypto got stuck there !! did not know of anyone with same problem .
8. Bittrex, i would also like to add Bittrex to the list of exchanges that you should avoid. because they scammed a lot of their users simply by changing their rules over night. that proves they can do anything they want without giving a shit and do it if it has lots of money for them.
I mostly verify my ID on any exchange that I plan to leave some money on so I never had any problem with them . And even my friends that needed to verify there ID to be able to withdraw got there ID verified in couple of days . Until now for me no bad experience hope it will remain like this .
9. Yobit, This is another exchange, which must be avoided. Support doesn't answer a few months. Your money can disappear without the reasons and explanations of the administration. The moderator sometimes appears in the chat, but doesn't respond to your messages... .
100% agree with this
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Couple of days ago BTC was moving up and suddenly Kucoin exchange stooped to load for a lot of users I lost some money because of it but I do not think this is enough to put an exchange in a list to avoid because it is a first time to have a problem with KU .
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I do agree out of this list only Yobit shady business and old Etherdelta for broken site both those should be avoided at all costs