Making the games unwinable takes a lot of the fun and unpredictability out of it all.

The detective woman could have played an interesting dynamic in her investigation of Jigsaw, continuing from the previous film. Being one of the people closest to understanding and possibly catching him. But no they just kill her off in the beginning. There's another detective who is in the beginning and then never seen again.

Most of the time (part of the inconsistency of Saw) Jigsaw usually targets people who have done bad things. The detective woman didn't.

Why is Amanda making some of the games unfair. When the fair games are what actually changed her. And the fair games are what John wants. It's all because of her obsession with John and him not wanting another apprentices? Meh.

Where was the lock for Jigsaw's "Favorite" trap?

Jigsaw's wife is not elaborated on.

I don't like how there's no discussion or self-reflection by the victims about what Jigsaw is going. There's only Jigsaw's monologues and Amanda's erratic and rarely reflective behavior, which are nice but i want much more of that and other things and just a generally deeper experience. Though i partially like that part of all this was a test for Amanda. I want discussions from different kinds of people and media about the meaning of what Jigsaw is doing, and discussions by the victims. We don't get any of that.

It doesn't make enough sense the guy at the end would kill Jigsaw and not help his wife or get an ambulance. Meh. Ending is meh. I don't care about the character at the end playing another game in the next movie. And with Jigsaw knowing he could die in this movie, his plan for the next movie for this character seems too small scale, and he would have already done his plan for him in this movie.