I depends on how you describe 'leg room'. For tall people, anything where your knees aren't painfully smashed against the seat in front of you is legroom, even if you can't extend your feet. Apparently for you, it has nothing to do with knees, it's means being able to stretch your legs out.
Every AC and every type of seat has their little nuances. Experienced fliers, over time and many miles, learn what they like and don't like about certain seats. You might just chalk this up as a learning experience and not worry about it because according to CO's definition, you got what you paid for.