>>8622714But you're wrong. I'm well aware it's from the Onion, and yes, generally speaking the gag is poking fun at boomers, because the character of Kelly is one.
But there are also a decent number where the joke is merely that Kelly is out upset/smug about a very specific thing that is implied to have happened to him that no one else will care or relate to.
For example, in this one, the joke is that Kelly is pissed he was told to stop just reading magazines in the store, so he went home and made a passive-aggressive comic about it. Clearly not simply a boomer/wrong opinion comic.