I didn't watch but Dr. Mrs. said the whole thing was highly traumatic to watch and you just want to strafe the entire show personnel from host to show runner to the girl who gets the coffee.
Maybe I'm too cynical, or looking back with the hindsight that all reality TV sucks and is edited to create drama out of thin air and am imputing that knowledge to everyone else who should've known as much, but I don't agree that you want to strangle everyone.
The producers come across as 100% complete douches, but that's par for the course for tv producers. (side note, I had no idea JD Roth became a producer. I just remember him hosting Fun House as a kid, which was Fox's knock-off version of Double Dare.)
Jillian similarly comes across poorly, especially on the caffeine pills thing.
Bob was a mixed bag; I honestly don't think the big "gotcha" moment trying to make him look like an asshat was all that powerful. I remember watching that episode when it aired and he didn't do anything your average boot camp drill sergeant wouldn't have done. You can argue that a reality TV show with obese people is different than military training, but by that point in time the Biggest Loser was a known quantity and you knew or should've known what you were getting into, especially in the gym. Having said that, there were other instances that made me cringe.
The blonde hosts came across fine.
The doctor actually came across better than almost anyone. I'm sure there was some willful ignorance there, especially given his past as team doctor for the Raiders, but I also fully believe him when he says the trainers and producers sidestepped him when they wanted to push things they knew he'd say no to.
The contestants...mixed thoughts on the ones they interviewed. I have no sympathy for the two that went to the NY Post. I mean, come on, it's the NY Post; you're really shocked that a paper only one step up from the national enquirer is going to sensationalize you? Some of the others, yeah, I get their disappointment at what happened afterwards and the lack of any ongoing support from a 9- or 10-figure franchise.
And the one woman (can't remember if she was a contestant or someone else) who tried to use Bob's heart attack to show that "see, skinny people can almost die, too, so the show's premise that being morbidly obese is bad for your health is wrong" can go join RFK Jr. in the land of absurdly bad medical hot takes.
Were it to be made today, you'd probably see a version that more closely matches the attitude of Great British Bakeoff with collaboration among the contestants, but it was also a product of its time. American Idol and the early seasons of "[Country]'s Got Talent" were still full on mocking the bad acts for ratings at that time.