Meta Sr. Software Engineer interview questions

I was rejected in phone screen round. The question that was asked was not a very well defined problem - the question was changed after some time (after I gave a generic solution after which the interviewer realized that the problem was too hard). I could only solve 1 problem - was not accepted on the grounds of speed (they expected me to solve 2 problems in 40 minutes).

Non-technical phone screen, technical phone screen, then remote on-site consisting of 4 interviews: 2 coding, 1 behavioral, and 1 design. Problems were a mix of leetcode easy/medium problem. Design interview was completely subjective and a waste of time.