"It's not fair...?" Is it fair for you to ignore her wants and wishes after she's given so much to you? Is it fair for you to disrespect her after she's provided everything you need, if not everything you want?

Maybe, if you actually start acting like an adult, she start to treat you like one. But whining about "fairness" is as far from adult as you can get. Why are you even fighting with her? What's worth so much to you that you'll fight over it with someone who's taken care of you your whole life?

If you know something about it that she may not, then yelling is not the way to go. Here's how grown ups handle it: we approach the situation calmly, lay out our points RESPECTFULLY, and then patiently explain our point of view. If the answer is still no, then request an explanation, again, RESPECTFULLY. And then you let it go.

When you get a job, you'll be expected to behave by the rules of the people you work for, whether you like it or not. It's just life. Grow up and deal with it.