I received feedback a few times and it was quite motivational. I failed an interview and the feedback stated that I need to work on more advanced object-oriente

I received feedback a few times and it was quite motivational. I failed an interview and the feedback stated that I need to work on more advanced object-oriented topics like SOLID and design patterns. I studied these up and it helped me land the next job. I also became a better programmer as a result. Recently I went through something similar - I was rejected due to the lack of of experience regarding modern front-end frameworks so I'm now going through a book about Angular. I now feel more confident when applying for fullstack jobs.