Sherry in Fear The Walking Dead season 6.
A romantic, lump-in-the-throat moment in "Alaska" gave viewers the happy ending they had craved since Sherry's The Walking Dead departure... but after a night between the sheets and a scrambled egg breakfast, everything fell apart. First Sherry distanced from Dwight because she wanted to kill Pioneer leader Ginny, but he thought it too dangerous. Then Sherry got annoyed because Dwight decided he would help, but couldn't without unleashing a darker side that reminded her of Negan. After Morgan Jones finally captured Ginny, the dilemma of whether or not to execute her came between Dwight and Sherry, then even when Ginny was killed there's still no martial reconciliation.
The constant back-and-forth bickering between Dwight and Sherry was (intentionally) infuriating. Surely overcoming Negan and rediscovering each other against all odds, the lovers shouldn't be divided by a minor spat over another villain who hasn't impacted their lives anywhere near as gravely. The apocalyptic equivalent of divorcing someone for leaving the toilet seat up, Dwight and Sherry stretched their ive aggressive feud over an entire season before making amends shortly ahead of Teddy's missile strike at the end of Fear The Walking Dead season 6.
Either the season 6.
Annoying as it might've been, the post-reunion division did serve a purpose. Negan did despicable things to Dwight and Sherry, and it'd be unrealistic to expect the couple would smoothly pick up where they left off before the Sanctuary. As Sherry herself eventually itted, her anger was never really about Ginny - Negan was still the underlying issue. But even if Fear The Walking Dead season 6's marital strife was justified, drawing out the arc into season 7 would've been tiresome. Dwight and Sherry being able to disagree without calling time on their marriage shows how far both have come.