While I'm just a developer, my wife is a director at the same company.
I multiple years, she's turned in her evaluations and had the director and VP above her tell her to lower several employees ranking.
One example was an engineer who didn't get along with the people on his team for a pretty high profile project. They know the guy's brilliant and don't want to fire him, so they move him to a lower profile project to decommission several server farms they had been struggling to get done. Dude goes in and absolutely kills it. They estimate he saved the company hundreds of millions of dollars by the tens of thousands of servers he decommissioned and renegotiated several large contracts the company was on the hook for.
My wife ranked him in the upper tier. He wrinkled a few feathers, but once they reallocated him, he absolutely thrived and saved the company literally a ton of money.
Nope.
He pissed too many people off, her boss and bosses boss mandated she give him a low ranking with a miniscule pay increase and minimum bonus in order to punish him for his behavior early in the year. Nothing he did after that mattered to them. Nothing.
When your work is a popularity contest and not measured on actual performance, its a toxic mix.