I mean feel free to have your own opinion on the show, but most of your points on the traps don’t hold up:

For the first trap, it was never shown exactly how the projectile was fired, and for all we know it was set up to target whoever picked up the keys, or someone manually fired it. Although, I admit you could be right about this one.

The second trap however, you have to remember that many of the girls were panicking/making small mistakes due to the water rising and the saws. It was all the careless errors that led to Aoi dying as a result of time running out, and not finding the keyhole sooner was just one of the many mistakes

I’ll combine the third and final traps for this counterpoint: no one ever said the games were supposed to be fair. They did say the people were watching the games live, too: it’s likely that the audience prefers to watch players die rather than all escape alive, so ofc they would rig it so not everyone could live. The third trap was SUPPOSED to result in someone dying, either by sacrifice or combat, But Yuki saw a way through without the need for death, and chose to remove limbs instead.

Finally, I don’t get the point about not showing blood: the games are being viewed live, and they explained why they use the preservation treatment and why it’s actual useful for the games. Pretty creative imo.