Thats no easy task, and choosing to kill Frank off screen makes a lot of sense.
The problem is, Frank never really goes away.
Franks ghost is right there in the opening scene of the series finale.

Credit: Netflix
Doug lays on his couch, pondering his upcoming life-changing decision: whether to kill Claire or not.
The Frank talk continues as Claire opens up about his corrupt behavior during a press conference.
Franks legacy is, inexplicably, the cornerstone of the series finale.
The stakes dont feel personal or character-based.
As Chapter 73 unfolds, its clear that the final showdown is going to be between Doug and Claire.
She takes the information public and does so to look tough on terror like her husband.
Claire even threatens to drop a nuclear bomb to stop the supposed sale of the weapon.
Plus theres Seth, who has no story, and Janine, who just promises to keep digging.
It all goes nowhere.
In fact, theres very little about the series finale thats surprising.
But, as the scene unfolds, its clear that the show doesnt have much left to say.
As Doug and Claire trade exposition, Doug admits that he was the one who killed Frank.
This shocking reveal kind of sums up the problems with this season.
Theres no real storytelling here, no real stakes.
Its a whimper, not a bang, of a final scene.
So what if Claire killed Doug?
Why should we care?