As per the name, the movie portrays a guy who's become a psychopath due to multiple waves of abuse during his school days.
Nevermind, about the plot or story or screenplay, it the about the director whom we admire just because of his making style.
If Myskkin does 10 movies even with the same plot, people would still admire, watch & applaud him just because of his making style which is unique and different, also called weird by some but that's what makes the audience watch his movies which works very well.
I was taken back a bit when I saw that nowadays even ladies as equal to men come to watch these kinda raw, violent, cold-blooded movies, maybe I'm witnessing/noticing this for the first time with this movie watching it in the theatres.
Although it was a good watch, it doesn't even stand nearby the director last hit: Thupparivaalan.
Also, the psycho/Vinay's characterization in the Thupparivaalan was much arrogant/violent and better designed than the one in this movie.