You may not always get the answers you want on why you weren’t selected for the job but don’t allow that to discourage you. The best thing you can do is to continue with your job search. The only thing you can control in the interview process is on how you do during the interview.
You want to remain professional through the entire process as that may not have been the job for you but they may have another job there that’s a better fit!
So don’t burn bridges, instead send a thank you note!