I used to do Crossfit (2 years, from the first day the Box opened until I left). Things I saw and didn't like:
1- Cool kids attitude. At first it was incredibly nice, people learning and encouraging each other to best themselves; at that time it felt like a team effort to get better. As time passed, the most phisically gifted and those who could train daily started to gravitate towards each other, since most people (who could only train a couple times a week or were not that gifted in the athletic department) weren't a challenge anymore.
As much as the "better yourself" is encouraged, when everyone's results are displayed you can't help but look. This created a "cool kids" group that started to interact less and less with the gen pop, so support from them diminshed during the workouts ( "Com'on, man you can do it! We only got 2 reps left!") unless you were specially friendly with that person or a hot/young chick. A word of encouragement from someone who is going through the same WOD as you are motivates a lot, even more if that person is nailing it. That same person nailing the WOD and then just staring at you as you finish 20 seconds later with a bored look, is not half as nice.
2- Obssession ensued. People got really obssessed with their results, what clothes they wore (in the sense they were Crossfit specific items from Reebok or other retailers to boost "performance" or rest or some other shit) and what they ate ( famous Paleo, "Try creatine, brah. It helps with the reps!"...).
Mix this with a strong marketing and need from users to brag about it at the worse moment because it's trendy, aaand there you go.
I stopped doing Crossfit because a) I plateau'd but, b) I couldn't put more hours in to get better at the main lifts, plus c) I didn't want to risk getting injured due to a lack of form, and d) By the time I finished going through this cycle the camaraderie environment had completely disappeared.