Thank you for summarizing how I've felt. Maybe it's because Amy's personality mirrors that of She Who Gave Birth To Me, but I have NEVER really liked her.
Matt seemed to try to think up birthday and anniversary gifts that he thought Amy would like (having her shadow a B&B owner over the weekend they spent there for their anniversary). Amy had mentioned that a B&B might be a good idea for the farm after the kids left. As soon as Amy saw the owner making beds, she asked her "Don't you have people who do that?" The owner said, "If the employees don't show up, the beds still need to be made." At that second, you could see that Amy (who we never saw make a bed in her own home) lost interest in the idea of the B&B.
At one point, Matt was staying home and running the farm, but then said that Amy told him he needed to get back out on the road to earn more money. So there he was on his little scooter, moving through the airport. And this was not too long before his neck surgery.
Is Matt perfect? Nope. But Amy seemed to be not very nice to him (and set an example for how their kids should interact with him). Hubby and I have been married almost 55 years. If one of us was in a wheelchair or on crutches (as each of us has been following injuries or surgery), the other one KEPT THE HOUSE PICKED UP to facilitate safe movement. Matt asked Amy to eliminate some of the clutter (especially in the living room/kitchen), and she snapped at him. He offered to hire a cleaning service, and she went ballistic.
If I had to choose one of them to hang out with, I'd probably choose Matt.