Google Technical Program Manager - Fiber Network Documentation interview questions

The overall process to get to Mountain View was pretty easy. There was an initial interview with a sourcer to make sure that I knew enough about the job to move forward. Then, there was a technical phone interview with one of the team members and that was pretty straightforward. Once I got to HQ, it was a little different. I interviewed 1:1 with 5 different people. Only one of the persons was someone in the group I was applying for and everyone else worked in groups under the same overall organization. 75% of the questions had nothing to do with the job description and was relevant to their job. The analogy that I would use is to ask someone applying for an auto mechanic job questions relevant to the stereo because it's in the car. That's not their job and why does it matter? Anyway, I still answered many of the questions because of past experiences but there were some that I didn't know. There was the "Googley" question that I feared and unfortunately, I failed (miserably). I'm sure that's why I didn't get an offer although I felt very good about my technical responses. In the end, I got a call 3 weeks later saying that "I wasn't a fit". Kind a crappy way to end the process. A little more info on why would've been nice.