Don't be too hard on yourself. A great interview explores the limits of your experience with the interviewer. That ideally includes some questions you simply cannot answer.
I have, very rarely, interviewed someone who had every answer I was looking for. In that case, she went on to build the entire team. But usually I don't need someone with all the answers, but just someone with enough experience to do the job while growing into it.
So sometimes missing some questions still lands you the job, and just informs my training plan for after I hire you. It's hard to tell right after the interview which way it went.
And sadly, I don't know for sure, until I've interviewed every candidate, so I rarely can give meaningful feedback right after the interview.
Also, if you were honest and communicated clearly, you likely grew your professional network, whether you get the job or not.
All that to say - you might not have bombed, after all.