Quick rant

My mom isn't letting me spend MY money that I into the bank even though I'm fifteen and won't let me have any access to money because apparently I need to save up for a car SO I was saying it was dumb how I needed to save up for a car when my grandmother bought HER a car and she can't save her own money to do the same for me. Then my mom said that grandma was more financially stable and not in debt so I just THOUGHT "Well, you would be more financially stable if you actually finished college and got a good job." I mean, really? I understand but she could have started saving up along with me at least or let me spend some of my money which BY THE WAY, I put into the bank with the intention of spending it via card but she told me it was instead a saving account AFTER I put my money into the card. Also, I haven't even seen the card after having it for two years. I'm starting to doubt I even have an actual account tbh...