Received Feedback after getting rejected

I am happy that I actually got some feedback from this one company but I am not sure how to work on it, I mean I am constantly practicing my UI skills so its improving but confidence idk what to do about that.

I have been rejected so many times my confidence is rock bottom and when I was explaining my designs I explained my thoughts pretty well but I considered the interviewer's point of view also, is it something which shows I am not confident or is it something else I am not sure about.

If anyone has any suggestions on how I can improve my confidence it would be very helpful.