The last thing I need from a casino is being slow on their withdrawals but almost instant in their deposits. It just doesn't make sense to me how these platforms are too quick with crediting your funds but are too slow to give you your hard-earned win.

I understand that it's sometimes network issues, or if you are playing on a fiat casino, bank maintenance and payment processor concerns, but I cannot really comprehend casinos that have no backup rails for withdrawals to ensure that their players are satisfied with the service. 

A random internet stranger's advice: once you received your remaining withdrawal, walk away and never look back. There are tons of new platforms out there that are delivering excellent user experience to cling into a platform that makes you anxious on whether your withdrawal will ever be processed or not.