But over the years, I have observed— multiple times—obviously talented people who have been slogging for a shitty company for years. It takes them forever to realize they are wasting their time and have to take some action. Some never realize, too.
Usually, they are people who have been promoted by the organization. They were early employees. They believed in the vision and found it hard to lose hope that things might change. The "Clueless" as the article notes.
But there can be an easier explanation as well. Partly, it's also sunk-cost bias. It's possible they do recognize the terrible place they are in. But find it incredibly hard to cut their losses. The organization can always dangle the carrot of "the turnaround is around the corner", "we will promote you soon", "the team depends on you".
A parallel is stock investing. I once invested in terrible company. Even though the deluge of bad news never stopped, it took me four years an my investment falling by 60% to admit that I need to admit I made a bad decision and sell my holdings.