For me, it's because he's such an unrepentant fake. Hasan is NOT smart, but he is smart enough to fully know what he is doing. Hence why he used to be Brotips and now he's larping as commie himbo revolutionary. It's fully opportunistic, like staring into an empty shell.
Most other cows are flawed in ways that deep down, we might be able to relate to in one way or another. Yes, many are in denial about their fuckups and quirks, and yes most of them are very annoying and stupid, but there's the camaraderie of watching a cow do stupid stuff and taking Ls. Hasan just doesn't give that joy because he's so unrepentant about what he does. Actually, this is very common in politicians who are born grifters, obsessed with their own image and media portrayal to psychotic levels. Hasan is basically a wannabe politician grifter, and politicians are incredibly awful people, so it makes sense.
I mentioned this before, but Gavin Newsom is the exact same archetype of person that Hasan his. Grifter politician who does nothing useful and is in it only for their own image. Driven purely by narcississm.