At this point after reading 10+ books about Percy if they still came to that conclusion despite having the context of the whole thing then they are just trying to pick faults, desperate to find something bad and negative about Percy but jokes on them there's not a single thing to find . The only thing wrong with Percy is his abysmally low self-esteem, and that's literally anybody fault but his.
This is like when someone gets an upper hand in a life for death situation, and their mind due to being high on adrenaline and emotions gives a perfectly natural sort of a hysterical response to the situation and everyone else going "Stop that, it's scaring me. You should have just died instead of doing that."
Say it with me. Percy choked Akhlys out of anger. Not sadism or enjoyment.