TA round, who was nice and friendly. Hiring manager round, who was poor, panel round with a case study, including HM, another PM, designer. Heard back a month later I didn't get an offer.

I was brought through a few rounds of interview including a phone interview, initial chat with head of product, then half-day on-site then another informal chat. After that they basically ghosted me and I didn't hear from them for weeks. Eventually I got in touch again to be told that I wasn't getting the job. I'm completely fine with a rejection but they put me through the ringer only to completely blank me - I thought it was very unprofessional.