Bad interview? (Ummm....)

I had an interview last week, and I've been thinking about it more and how it could have went a lot better. On a few questions that caught me off guard, I noticed that I said "um" a lot.. And I feel that I could have answered some questions much more fluently. My interview was about 35 mins (norm is about 40) and I only had 2 questions to ask at the end of my interview.
Some things I feel went well was that I was able to discuss my involvement in my family's business, where I talked about a...

Bad interview? (Ummm....)

Bad interview? (Ummm....)