I thought it was... ehhh.
Seemed lame that he could control himself for 10 years and get a normal life, and seemingly couldn't even kill a deer he was trying to hunt, but then he just HAS to kill this one douchebag and put everything at risk. Like, they're showing that women are going missing so presumably there's a serial killer around. If Dexter fell off the wagon to kill that guy, OK. But some spoiled dudebro? Eh.
And if this all ends with
, ehhh x 10.