Although there are numerous rules to comply with, most prop firms only have some of these and not all of them. It really is a case of deciding which are irrelevant and which are likely to be restrictive, depending on your trading style - and then finding a firm whose rules match your style.
For example, minimum trading days is hardly a problem for day-traders!
I think the most likely problematic rule concerns news trading. I paid an additional add-on fee on my account in order to omit this ruling. I don’t trade news as such but it is an irritation when holding a position to always have to check whether there is a news event ahead and have to close out beforehand.
I am not sure what this rule is:
But, in general, a lot of the rules do, in fact, guide the trader into a more consistent and professional style of trading, and that isn’t such a bad thing?