I lack context as a non-reader, but goddamn that sounds bad on it own. Aka truly will never beat the Hacka allegations.
I explained the plot to my best friend a few weeks back and he had the same complain about context.
The issue is, even with context it sounds just as bat shit insane.
When Aqua was still a doctor and Serina was still alive, they saved a crow caught in a trap. The crow was literally the god Tsukiomi. I don't know why Tsukiomi could not escape a trap, but there you go.
After Aqua stabbed himself and threw his dad off of a cliff and jumped in after him, Aqua briefly reflects on how he wished there was more stuff for him to do as Tsukiomi monologues about everything he was in life, then watches him fucking drown and does nothing about it.
This raises a few good questions like: What the fuck is Tsukiomi's role in this story if it isn't to use her divine powers to save anyone? She literally just shows up like every twenty chapters to monologue about shit and pretend to be Aqua/Ruby in a movie and otherwise do nothing.
Why the fuck was the logical solution to dealing with Aqua's dad that Aqua, a presumably intelligent person came to, to be fucking stabbing himself and drowning in the ocean in winter?
What was the point in Aqua talking about all these hopes and desires he had and unrealized dreams/loves if in two chapters he was literally just going to kill himself and not dwell on it. Plus there was a large portion of this chapter that was seemingly Aqua realizing he didn't want to die and failing to swim to the surface.
All the bullshit tends to point in my mind, that Aqua ain't dead and we're getting some retarded Deus Ex Machina bullshit. Aqua didn't want to die after all and so Tsukiomi saved him, and the person they fished out of the water wasn't Aqua but his fucking nearly identical father. The fishermen make no mention of a stab wound, so its probably the dad's body.