Yeah. This right here.
The problem with corporate america isn't that the work is boring; it's that for most jobs it's actually evil at some point in the pipeline. (To use a metaphor - you're still morally culpable if you're carrying boxes of bullets to the soldiers doing the actual killing). Almost no matter what industry you're in, whether it's shoes, or batteries, or electronics, you know that somewhere on the other side of the world, actual slavery is providing materials and labor for what you're selling, and you really wonder why we can't all mutually agree to make that illegal.
There are very few professions (often stuff like medicine, teaching, etc) where someone can sit back and think "yeah, my day job is a net positive for humanity".
It's hard enough to cope with when something is a decent "material good" on its own - like if you're selling shoes (virtually all of which get made in sweatshops), at least you have the pride in the fact that shoes are a necessity. It sucks that slavery was involved in making them, but at least you know people are getting genuinely good clothing out of it.
But when you don't have that - when you are, say, working in market analysis or advertising, and you realize your job isn't actually making anything or filling any material need - or even just bringing people joy, yeah, it's a bit worse than being meaningless. You're flushing the best years of your life down the toilet to make a little more money for some private equity firm. Great.