the meme plays out like alot of these memes where one side is being “irrational” and the other is making points.

That meme is routinely read both ways, with the Too-Intense Guy and the Too-Casual Guy interchangeably sympathetic.

In the original bit, Casual Guy is a chronic fuckup and Intense Guy is at his wit's end. You're supposed to sympathize with him, not the fuck-up.

idk how this meme isn’t suppose to be taking a jab at vegans

It's picking apart the apathetic anti-vegan lines point by point.