Recruiter call, Technical screening, Final rounds - 1 technical, 1 hiring manger, 1 system design, 1 executive. Straight forward interview process. The interviewers had already decided not to move forward even before the interview started. They looked very uninterested and didn't have any intention to move forward. Just wasting time because they have nothing better to do. Final round interviews should be onsite. Because companies don't spend any money on the interviewee by taking interviews online, they keep taking interviews for months, and making the whole process tiresome.

Interviewer had a particular solution in mind that took a different approach from my own. My solution was algorithmically correct but not one that they were familiar with and preferred a non-closed form solution.