I'm going to go against the grain and say that interview feedback is overrated (at least for senior people). If you got offered the job, then there's your feedback. If not, the interviewing company isn't going to tell you any more than you could already discern yourself by playing back your answers and conversations with the interviewers. If you honestly feel you aced the interview, then other factors are in play - perhaps they realized they are overstaffed, layoffs are imminent/hiring freezes, or just a slightly better and more personable candidate came along.

One time I interviewed for a position that I wanted badly. I studied and prepped for the interview, then during the interview I nailed every question. I waited a week but never heard back. After a few weeks of silence and giving up hope, I searched the company on LinkedIn, and found the person they hired for the position. It turns out he had more backend experience, which is what they were looking for. It was a painful truth, but them sending me a rejection email telling me this wouldn't have helped me at all.