The fact that the author writes these "endings" as 4-koma gag panels means he is 100% fucking with the audience and trolling them. He knows it makes no sense for Shun and the gang to behave the way they do or for Kyou to constantly get away with all his bullshit and he rubs salt in the wound by presenting what reality would actually look like as a surrealist joke.
It is honestly kind of impressive in a fucked up kind of way, like through all the disdain there is a spark of respect for their ability to string people (mainly their editor) along and give zero fucks. He's still a hack fraud, but if all of this turned out to be some epic Andy Kaufman-esque prank I would have no choice but to applaud him.