You are right in some ways. If the casino came on here and said, ‘yep if you ask to self exclude we make you wait four days’ then fine, that is their policy good for them. However, if the casino comes here and says we protect our players in certain ways and fail to do that, it is in part their responsibility for any harm caused after someone attempted to self exclude.
When you are really seeking a way to give up your gambling addiction then only the professionals can help you. There are many online resources, you can study. You can even find the local groups who council each others to overcome the addiction.
Start with some of the followings:
https://www.gamcare.org.uk/https://www.reading.ac.uk/https://www.gambleaware.org/