Everybody knows the daily limit but from saying it to implementing it is a huge gap.Many people can't stick to it although they set a daily limit.They get mad when they lose this limit and say I just want to hit a few more spins and quit but this leads them to losing everything.
Of course, the problem is that to set a daily limit is a rational decision, while when gambling we are often driven by emotions. A problem gambler, as the OP seems to be, is not going to find it useful to make such a rational decision. The best thing to do is to give up gambling for good. It happens like with an alcoholic, the only solution is that he does not drink another drop in his life, because a single drink triggers the old self-destructive pattern.