At least we never had to witness the show jump the shark or run out of ideas.
Honestly, I felt it was at least circling the shark in season 3. It was a little too contrived about ruining all the main characters' lives at the same time in order to make things bad enough to lead to the climactic decision. And I believe I commented above on how much Mac ended up seeming like an abusive, gaslighting husband sometimes, which was pretty unpleasant to watch.