Why is it so damn hard to get a job as a teenager?

It’s damn hard to get a job as a teen! I really want to save up for my car and my college. My parents are getting very frustrated with me because I need to get a job. I’ve applied to multiple places! I’ve applied to McDonalds, Wendy’s, Dairy Queen, Subway, Starbucks, Wendys, Chick-Fil-A, and more. No one called me back! I’m literally 14 and really want to make money. I really think schools should teach us the ways of jobs and your resume! What should I do? I’m trying really hard but no one wants to hire me!