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Allow me to give you some advices.
create cold-wallets that are difficult to access (buried under the soil and miles away from where you live + with multi-signature and other hard procedures to unlock the funds).
tackle the problems of the game, because today you have created an account on primedice, tomorrow you could simply use a new site vanishing all the efforts and requests you have made to them.
it's too easy to bypass an IP address block. and it's true many cryptocurrency based gambling sites are pretty terrible at self exclusion due "anonymity". unfortunately I believe that the only effective method is the one used by some casinos which clearly require KYC.
They allow you to set gambling limits that cannot be changed in a short time and block the creation of double accounts.
Unfortunately, we all know very well that the industry cannot regulate itself...you have to find the way to avoid these problems
the bottomline, it is the user himself that is in control of this situation. these casinos would allow the creation of a new account as you need to consider that they don't know who is creating the account. even if it is the same IP, who knows, it maybe your brother, sister or anyone using your IP? it is not their responsibility to ban the IP but usually they are relying on player's account. so if you create a new one, that's not their problem anymore. you can't accuse them of having weak self-exclusion system. it is the other way around, you failed yourself to change the path away from gambling. in this scenario, it is the gambler himself who is in control of the situation.