I traded there in the past and I never had problem with them but users complained about waiting for withdrawal for several months, and yeah, they have shitty support. They don't care what they put on exchange.
I have traded also there. I was face problem regarding 2FA code on email address. I never received any code on my email till 6 month. 0.1BTC was there once BTC was almost 20K. I was unable to withdraw fund due to email verification code. I had submitted lots of support ticket. But unfortunately I had not got reply. After 6 month they send verification code on my mail. Then I withdraw my all fund immediately and never use anymore. But bad luck when I withdrawn BTC was 6K 
. However I have loss by using Yobit and I don't trust them.