That’s not a shitpost, that’s a basic meme that took effort to make and come up with, it’s only absurd for comedic effect & low-effort. It’s not trollishly low-quality, nor meet enough of the other key hallmarks to condone qualifying as a shitpost.

^Actual shitpost, AI generated image with text slapped on it. Another example is the common “all Linux users are femboys” memes/inside joke. They are intentionally poor quality, absurd, and designed to provoke reactions with minimal effort.
The “average X fan vs average Y enjoyer” meme is another good example of a shitpost. It’s intentionally provocative through its absurd comparison and exaggeration.

“aggressively, ironically, and trollishly poor quality… cause the biggest reaction with the least effort. …internet mockery… …absurd… …confusing… …awkward and irrelevant…”

en.m.wikipedia.org/wiki/Shitposting

My post that was unfairly removed was intentionally provocative (Oxford), and ironically, trollishly poor quality (Wikipedia) and exaggeration, just as the example shitposts provided are.

provocative ≠ inflammatory

Provocative : causing annoyance, anger, or another strong reaction, especially deliberately.
Inflammatory : deliberately arousing or intended to arouse angry or violent feelings.

(Oxford)

Provocative in the context of shitpost essentially means deliberately causing a strong reaction usually via exaggeration for comedic effect.
While Inflammatory just means to deliberately insight violence usually via slander or liable.

Another shitpost for example :

This meets : intentionally provocative (Oxford), and ironically, trollishly poor quality and absurd, exaggeration, etc. (Wikipedia).