This is the one aspect of the show "Last Week Tonight" that always irked me. He makes fun of peoples appearances too much. It's just not good comedy or even a good insult in my opinion.
Yeah it's soured me on him over time. Jon Stewart held against people their behavior, but John goes all over the map and sometimes it just makes him less convincing IMO
I like them both but disappointingly, they both insult people based on superficial traits. Seems like every time Stewart talked about Mitch McConnell he would do the turtle thing where he made fun of the way McConnell looks and speaks.
The one person whose appearance John Oliver has made fun of more than any other is, John Oliver.
Aside from that, he punches up, politicians, celebreties and sometimes just random people, but always in playful manner. Hes quite fond of absurdist rants and comments, I find it thoroughly entertaining.