Kearney interview questions

I found the interview process below standards that the company claims it is at. I had 4 rounds of 1h interviews, and I did not get the offer. When I reached out for feedback, I was told by my last interviewer that it was a joint decision of all the interviewers who I had talked to. However, when I reached out to the other three, they said they had no idea. So it boils down to - if one person doesn't like you, you are out.