Didn't enjoy Sansa getting crowned
I can't think of a worse person to be given power than someone who pines for power...and Sansa wanted it, she wanted the crown.
Maybe I'm wrong, but didn't she give John some flack when he first returned to Winterfell after she'd been in charge...and he had to repeatedly assure her that he only wanted what was best for their people? And its cool she didn't want to bend the knee to Dany, but she seemed almost catty towards her. Towards the person that'd just saved them all from certain death, and who'd gone out of her way to connect with her, trying to get on her good side. Nope, Sansa wasn't having any of it.
It seems like she had her eye on power for awhile now. And then she's given it...and not a crack of a smile or a nod of appreciation, just a stoic, "You're damn right I'm in charge" look. She looks like someone who takes herself pretty seriously. And after having been abused and powerless for so long, I'm sure she does. This is all about her IMO. And that's not a trait you'd want in a leader.