>>100880564I think because he takes himself so seriously, but he's so extreme that he's funny in a Rorschach kinda way.
Not in-universe funny, but as a reader, he's so pinned in the red, it's amusing like, "Can you believe this fucker?!?".
Plus all the sitting around, just standing there with his arms folded behind is back, the complete opposite of the usual physical action we're used to in a comic.
He's got nothing but time and is content to make incremental victories as a glacier scours the land.
As opposed to Thanos, who is just a whiny teen who didn't get his way.