NBCUniversal interview questions

Applied online, HR phone screen, 1 interview with Hiring manager, 2 interviews with other managers, 1 on-site interview with the VP, 1 on-site interview with HR. Lots of behavioral and overall get to know you questions, nothing too difficult. However, I felt like they wasted a lot of my time while dragging the process out until I heard back from the final interview. They also requested 5 reference surveys (10 mins long) before final interview. They should only requested references if they were gonna make an offer. I felt bad that I wasted so much time of my references. HR person was super nice and helpful, but the process is really drawn out.