Mark Rippetoe (he's a popular personality in the powerlifting world) was affiliated with Crossfit in the beginning, mainly doing workshops on demonstrating basic barbell lifts. He liked how Crossfit was, at the time, a welcome antidote to the "Globo-Gym" death grip on fitness.
But he has distanced himself from Cross-fit for years now, and has a huge amount of criticism due to the emphasis on high-rep Olympic lifts. The high reps result in poor execution and injury at worst, and in uselessly light loads at best.
The first time I ever saw rhabdo was when I was sent to Outward Bound for a month as a teenager. A guy in my group wasn't very fit, and he got it from several days in a row of intense distance while backpacking. We were told how insanely rare it was when he got back, and the doctor at the time told him it was only seen in guys in boot camp.
Suddenly, a few years back, my rock climbing gym had a crossfit area. Then I start hearing about rhabdo all the time. I noticed that extremely fit rock climbers would do some of the team workouts, and then refuse to go back for the rest of the class they paid for. Their conclusion was the same as mine: any fitness regimen that makes it difficult to function in your day to day activities for days on end due to extreme soreness is not something that should ever be viewed as fitness. Fitness is something that can be integrated into a normal life.
I think CrossFit fell victim to its monetizations scheme. The original folks made their money by awarding certifications to trainers, who would then go start their own classes/gyms.
Like everything else: it started as a movement, turned into a business, and then devolved into a racket.