I've gotten rejected for jobs that I was perfect for as well and I'm not sure why it was.
A lot of people do get rejected for jobs they are perfect for and are qualified for and it could be your appearance or the way you're dressed or how you act in the interview.
Don't take it personally and if the job rejects you then that's not the right place to work anyway and it usually means that you're gonna find another even better job that will accept you.
When you get rejected from the job you're perfect for you should ask at the job interview for feedback and what they are rejecting you for.
Some people will be honest and tell you why they reject you and others may not.
When going into a job interview you should make sure you're dressed nice, clean and your hair is in good style.
The better you look the higher chance you have at getting the job.
It's very normal to get turned down and rejected for 20 or even 100 jobs before you land that job that you're applying for.
There's been times I've put in 100 applications and only 3 of those jobs ever called me back and I got one of them.
So keep trying and put in a lot of applications to get the job.