Yeah, I mostly thought it was pretty ludicrous TBH, and it left so many gaping plot holes.
I actually LOL'd at the little boy seeing Mare at the football field and immediately intuiting that SHE KNEW. Like, she's his mother's best friend and they live in a small town. Wouldn't he see her around MOST DAYS?
Also WTF was going on with the teenager who was originally thought to be the father of the murdered girl's baby? I get that he was one of the red herrings, but was there just no explanation whatsoever for all of his shifty/outright villainous behaviour in the preceding episodes?
And how the hell did Julianne Nicholson end up getting custody of that baby so easily?!
I probably over-think these things, but nothing in that final episode felt like it made any sense whatsoever.