You are still quite young for the job market. My son applied to dozens of different places over a period of two years before he was finally hired. The way the job market is, there are so many candidates for each position, and employers tend to hire more experienced and older candidates first. So it is really difficult at your age to find a decent job. But that is NOT a reflection on you as a person at all. It's just the way the business world works. Like I said, my son worked really hard for two years, interviewing over and over again, and getting lots of rejections. But the right situation finally came along and it really was just meant to work that way for him.

So persevere. Keep applying and interviewing. Try not to take not getting hired as a rejection of you as a person (I know that's hard, but that is how you will be able to keep at this.)