I was on the set for one of the productions, and I'll just say at the time I thought the experience was a one-off for one of the bigger productions they've put on. Since reading other people's stories, it seems more a case where the pressure to push, push, push for the next big video is a ginormous machine that grinds people pretty hard.
An early stage startup, with a few employees, pushing to hit some milestone, could survive like that a while. But you can only burn through so many creative minds driving them at 110% all day like that. IMO, you have to find a sustainable burn rate that might be too much for some, but isn't going to drive away everyone desiring normal family / outside work life balance, especially 5-10 years into an org's lifetime.
MrBeast (the org) has hundreds of employees and probably 5-10 major active productions (in pre-prod, prod, and post-prod). They've achieved a lot of impressive results, but they also get to cut a lot of corners traditional media (Hollywood, TV production) can't due to labor laws and unions.
Edit: Not to mention, the 'No does not mean no' section was a bit alarming. There are plenty of times when no most certainly means no, and you can really damage business and personal relationships if you can't figure those out.
His employees are probably payed well, but obviously don't make as much as he. So I guess asking them to give up their lives for less compensation is to say their lives are or less value...
No one is forced to work there and they are not taken advantage of.
Any of them are free to start their own channel and outcompete him! It's literally how he did it!