HiPeople interview questions

I was sourced for this role and pushed through the gauntlet. I excelled at every step of the interview process including building a case study from scratch, a mock call with slide deck, an assessment, and a mock getting started video. I did this all in under 48 hours. I went through the entire interview process and then 6 days after my final interview round, was rejected and I'm not sure what I did wrong. I respect them and their product but I feel used and taken advantage of from this experience.

They use their interview to get a quick review on one of their product, they just automatically send you a link for an online interview. which happens to be one of their product, the online assessment is about 25 mins long, weird and absurd for the role. They never responded afterwards. One of the worst interviews.