My wife feels this way (mostly) about her second marriage, to a total scumbag of a human being. She says she wouldn’t appreciate me nearly as much if she hadn’t been through something that showed her how truly awful a marriage can be; IOW, if you’ve only experienced 7, 8, and 9 on a scale of 10, a 7.5 won’t seem all that great; whereas if you got stuck with 1s, 2s, and 3s [“There weren’t any 3s… Okay, maybe our wedding day was a 3. Maybe.”] for almost five years, mostly 7s and 8s with an occasional 9 thrown in seems pretty wonderful.
She has, however, turned down my invitation to go dance on his grave (he died after Deb divorced him but before she met me) because: (a) she feels silly dancing in public and (2) he was cremated.