Its really simple, they turned their hobby into work with impossible schedules and really bad overtime. They're unhappy because the work they invented for thems

Its really simple, they turned their hobby into work with impossible schedules and really bad overtime. They're unhappy because the work they invented for themselves isn't based on their interests but for popularity and viewers interests. They are afraid of losing audience and missing out of more exposure, because their work defines them as a person - if they start losing popularity/attention their persona was based on, it knocks them down a peg, like a celebrity in the end of their career. So they double down on their work.