My (most likely) VERY Unpopular TMA Opinion:
We only got one season with Sasha, so I always liked her well enough, but never to a huge extent, since we just didn't have enough time to get to know her.
Then, fast-forward to the end of season four. We got the scene with her and Tim bad-mouthing Jon and saying Sasha was more qualified for the job (like ??), and then that birthday scene where, again, they were kind of awful to Jon...
My entire view of Sasha soured with those few minutes.
Sasha suddenly came off as an entitled asshole. She was no more qualified than Jon, but apparently acted like she was some victim of misogyny and bitched about him behind his back? Jon, who was so committed to the job, working late and coming in on weekends, putting everything he had into doing the best job he could no matter how little Elias gave him to go on. And Sasha acted like Jon only had the job because misogyny? Seriously?
And she and Tim had clearly talked about this before, many times. Which is so shitty. And that behaviour during the birthday scene just reeked of blatant, outright disrespect for a person she'd convinced herself had taken HER job. God, get over yourself! Like, am I crazy for being so put off by this? Everyone in the archives is at least a little bit of an asshole, but this just came off as really nasty to me.
I just... could not stand Sasha after that. And the AU premise of Archivist Sasha makes me mad just by its association, since it always plays out like an endorsement that Sasha was right, she deserved the job more, she would do everything better, and Jon sucks at everything. More power to people who like her, which seems to be the majority of fandom. You do you, I'll do me. Bleh, why am I so angry?
Guys, don't be assholes to people who get promotions, especially shitty, thankless promotions.