@gomichandesu
what he clearly WANTED to do by desiring to cross the river time after time.
The issue here is that you are taking a metaphorical and psychological experience, and trying to read into it literally, while adding interpretations not evident from the original text. There is no indicator for suffering, nor a sign that this was anything beyond a metaphorical representation of the character being at death's doorstep.
I also might argue that the line "I feel like the storm up until now were just lies" is nodding at how he was only artificially alive to begin with
This I can agree with. That is not to say that I agree that this is for the best, for all that we know the character may have been able to get out of coma - they just stopped his life support.
Considering this ambivalence, and the emphasis in the text, I don't think there's a reason to try and artificially attach additional meaning just to fit a narrative. What's unambiguous is that it is a story about a patient on life support that "goes to the other side" after his life support is stopped. Nothing less and nothing more - any extra interpretations rely on wild guesses.
I am fairly certain that this ambiguity is intentional, the author is notorious for this, as it is often used to create an illusion for depth in their works.