Yeah, even though pizzacake takes stances I generally agree with, her work has that "this comic only exists for me to express my social and political views in a way that amplifies my voice online" type of quality. This type of art usually is:
- Flat or pillow shaded for simplicity, because the beauty of the image isn't relevant to its purpose, and the artist needs to produce it quickly to respond to current events
- Depicts characters, even protagonists, in a mockingly exaggerated way, because this is the main form of stylization the comic must support in order for the author to make fun of strawman versions of positions they don't like (because anything beyond a strawman, regardless of position, does not fit in a digestible 4 panels)
- Simple and repetitive poses with no dynamicism, often because the artist is not a very skillful artist, because they only developed the skill to make comics like this in the first place
Basically, it's visually unpleasant because the only reason this has any visual component is to make it more eye-catching compared to just text. Unlike most art, it does not need to be visually appealing, and in fact even benefits from being visually unappealing, as an art style that pisses you off a little is more likely to make you feel a vague sense of there being a problem to resolve - which the comic tells you is the issue it presents. Even advertising has to be eye-catching first, but memorable and compelling after that, because you need to take it in very quickly. Whereas this has the expectation of reading built into it, which frees it from what little need to be pleasant it may have left. The visuals are nothing more than lubricant to help the text go down.