I mean if you take it straight and not as a joke, it sounds like the manifesto of Elliot Roger. And that's the issue not everyone is taking it as a joke.
If you remove context and intent from just about anything you can imply someone sounds like a serial killer or a psychopath. Context and intent need other human beings not to remove what is staring them in the face but accept it. Something can still be wrong, a mistake or worthy of criticism, without anyone having to start making things up just to make something appear more extreme or serious than it really is.
This is quite clearly immaturity spawning jokes gone wrong with bad delivery, timing and place. Not the future grounding for a Netflix Documentary called "Making of an Indian tennis superstar serial killer".
I don't understand some people who take things and say I'm going to ignore what this actually is, to take it how I want, so I can tell you the original intent is what I'm now telling you it is. My brain works based on facts and evidence. I care about what something is, not what I want to feel it is. The world needs more of that and less of "I'll just fill in the blanks or completely make things up to fit my hypothesis".
The guy who probably does have some self-confidence/ego tries to do a comedy routine you'd expect an Indian comedian to do in a teen comedy/standup, it understandably fails due to the setting, location and overall audience, the guy gets blowback, apologizes, and life should go on. No one died, no one was hurt, no one was specifically called out or harassed, it was embarrassing for the individual and the school.
However, this goes viral, then other people start speculating maybe he's some sort of incel future serial killer/harasser/rapist or whatever a mind fills in the blanks with, a frenzy gets whipped up, school becomes a media circus, MSM and forums/blogs/FB/Twitter and where else have
fun for a 24 hour news cycle, etc. The most unflattering part of that for me is the taking of someone you can know hardly anything about and extrapolating such dire and serious projection as "incel" and some nods to genuine violence without having any evidence supporting that being true of the guy at all. Why not take what the intent seems to be, and accept it, and still be able to say I'm glad he apologised, that was inappropriate. Why does it have to go to "life should be ruined" this quickly? That is what I do get frustrated with when I witness it with parts of the internet and social media at times.
Take the facts as they are, respond to the facts, make opinions on the facts and state what reasonable outcomes you expect for consequences around the facts. Less hyperbole and less flying off the rails to fill in the blanks or exaggerate stories for effect would make the internet a marginally more tolerable experience from time to time.