I'm gunna go ahead and actually, in a way, say Severance. Despite its amazing acting, ending, cinematography and unique premise. Spoilers (general below) - the organisation behind it seems to be suffering from a kind of villain decay.

Severance S02 had a great and impactful ending that set the stage for S03, but Lumon itself as an organisation is still bizarre and barely explained. It got all the personal arcs of the main 4 right, but not the purpose behind Lumon (beyond them just being some dysfunctional cult). And I don't mean Lumon is shrouded in mystery in the sense of leaving the user to wonder after being fed shreds, but the whole meta behind that organisation just seems like a complete mess. They're global and powerful yet seem to exclusively reside in this single building with a management that consists of a half-dozen people purely circling around experimenting on two people. I could go on here if pressed. I want to know more about Lumon but it seems the writers are just focusing on "haha weirdo cult", "milchick epic dancer" etc.

It's set up as a weird combination and criticism of cults (it's very scientology coded) and work culture in general but hasn't really progressed much there.