One constant I've always heard is never say anything negative about your former employers so, yes, I think you should've worded it differently. You could've said something like, "I would hope my boss would detail my stellar 13-year experience spent not only jumping through flaming hoops on one leg but also while balancing teacups on my nose."
Don't beat yourself up about it as the interview is done and over. It's hard to respond positively or neutrally when caught off-guard about something that's negative. I, in an interview, was once (not ethically, I think) asked about a former coworker from my (at the time) current company who interviewing company was looking to hire. FC had last left me with a very bad taste in my mouth by flying off the handle at me about something that was none of my doing and, even though I calmly fixed the situation, never apologized to me or thanked me for fixing it. I really refused to ever speak to her again (for non-professional reasons) for the rest of the time she was at my current company so when the question came up about her, I was a little thrown by being questioned about her and, while I answered as diplomatically as I could, I still said more than I should have (she had been notorious at current company for getting nothing done as no one was paying attention to her so I'd said, "She requires micromanagement" and left it at that). I shouldn't have said it, but, frankly, I always knew I said it as revenge for the way she had treated me (which I always knew was wrong to say -- true, but wrong -- but said it anyway). And, no, I never did go work for that other company (they couldn't offer me enough money to cover the huge additional commuting I'd have to do).