I think my all time worse experience is when a casino support doesn't offer any tangible help or support which is literally opposite of what they are for — providing support. If a user opens a support ticket, more often than not, there's an issue that needs fixing and if the support isn't helpful then that defies the purpose.  And if support can't resolve it and needs to escalate it, that should be the next move rather than closing tickets and try to evade further dialogue.

That's one way to drive me out of using a platform.