if you ever browse r/gradstudents its about as depressing as posts on this sub; and if society's most promising students are constantly forgetting they're enough, maybe you did too.
Been through grad school, 1980s. Survived. Tenured. Emeritus. Retired. I'm sure it's only gotten worse. The whole thing is set up to weed out… basically a whole bunch of people, because higher ed is not providing enough jobs for people with PhDs. (Yes, I know there are advanced degrees that don't lead to an academic job.) And it's set up to provide a slave labor force of teachers for undergrad classes. A lot of fine people end up bag ladies, or moving off to organic lesbian goat farms (two examples from my peer group).
And it's functionally a stress test, to find the cracks, before grad students get out in the real world and face the insane demands of a life of itinerant adjuncting, the horrors of seeking tenure, or the other professional jobs that require higher degrees. If they crack after graduating, they can take a lot of other people down with them. (Seen that happen, too.)
That doesn't excuse any of it, not by a long shot. A whole bunch of stuff in this world needs to be reformed. But: it does offer a chance to see that it's only a game—and if the game is something that makes you miserable, you need to find a different game. A game where you can find ways to be kind, and not perpetuate the misery.