Started with a short call with HR, followed by on-site with hiring manager, who was clear in the role expectations and explained the wider team's roles clearly. The interview ended with hiring manager expressing some reservations and I was prepared to end it. One week later, got scheduled by HR for a video call with a cross department manager, and a week later, followed by 3 more rounds with other departments. Got a generic rejection a month later. Probably if they had decided to eliminate candidates after first round, it should be done asap and not after 5-6 rounds, which is a huge drain in time and resources for everyone. All the interviews were polite and willing to share their role and how it links to the hiring team's role.