Box Software Engineer interview questions

First interview was algorithms in my case using priority queue (in this part I was allowed to use internet). Next part was divided into 4 interviews: behavioral, with hiring manager, design (design elevator system) and live coding algorithm. It's nice that they provide feedback from the interview. In the end I didn't get an offer because according to them I lacked experience, even though according to feedback all my interviews went well. I feel they wasted my time because I didnt apply for this position, they contacted me on linked in.