Viktor who was always, always about the family suddenly doesn't care that much? Just becomes a himbo? Whatever happened to Luther's wife? We don't know. Does he even know? They ruined Allison in season 3 and just kept going with that trend.
I despised with a capital D everything done to Diego and Lila. I loved their relationship and it got completely crapped on. Lila and Five were the grossest thing ever. And then the ending is just like "The world is better off with all of you dead". Nice. But what happens to Diego/Lila and Allison's kids? Do they cease to exist, too? If for some unexplained reason they remain, then who raises them? I guess Claire can go back to her dad but what about Diego and Lila's kids? Both their parents are now gone. It was just awful.