It lacked the heightened tension and intrigue of the first two seasons. Of course, that's partly because we're familiar with the pattern and style being three seasons deep, but Joe's relationships never felt realized, and the subjects of his desire were more or less objects to get the narrative moving forward. Whereas you were invested in Beck and Love over the first two seasons because their currency were in the circulation of being the muse of his sociopathy.
Normally, I like characters to be fleshed out, where I have some understanding behind why and who they are, but the nature of Joe's character has never warranted that. In the attempt of trying to humanize him, it broke the spell of his magic, where you'd be better off not knowing how the trick is done, and left to wonder in the act of it. He's not meant to be an antihero; we are not supposed to root for him in any capacity. His immorality is meant to be observed, and not empathized with. It's what made his actions and inner-monologues worth suspending disbelief for. To make matters worse, the soap opera tropes: the bored housewife, the librarian, suburbia and contemporary life, parenthood, social media, his childhood trauma leapt right into the sea of satirical predictability, where the first two seasons managed to carefully walk in the sand without getting its feet wet.
This season was really a tell-tale sign that this show has run its course.
This finale was pretty good 
I’d let her ruin my life 