Thomson Reuters Senior Manager, Demand Generation interview questions

Had four video interviews over a two month period, each interview they did not know what level I was at or who I had spoken to before. Received no feedback from HR only an email a 1.5 weeks later to schedule the next interview. After the fourth and what I was told final stage I have not heard anything from HR, after following up for two weeks I gave up. Extremely poor experience and has been a big waste of my time.