I stopped watching after several episodes in a row felt exceptionally biased and unfair. Alas I did not write down the topics so I've always had trouble describing to people why I don't like John Oliver.
And before you say "Well, yeah, the other side does that, but thank goodness my side doesn't do that", I would challenge you that as you read your next couple of political articles, click, pull them up, maybe zoom your browser until the entire article fits on the screen, then just sort of defocus your eyes for a moment and just look at the pattern of text and quotes on the screen. Do you already have a pretty good idea what the paragraphs are? Do they fit the description I just gave you? I won't claim to read a completely balanced media diet, I have opinions too, but I do at least sample a lot of things, and this pattern is universally used.
It's a cognitively-hazardous way to consume arguments even before we discuss its addictiveness. Putting it in video form is probably even worse.
No.
I've been on the opposite side of some of his rants. You do not get the best counter-arguments. It's just another media spin show where you get the weakest arguments, pre-digested and cued up with the best media management possible for you to laugh at them.
He can do a decent job of substantiating his points, but you are not getting anything like the whole story, and if you think you are, you're hardcore in a small filter bubble.
(And if you're about to start trying to explain to me that yes he does give the best counterarguments, you're pathologically in a small filter bubble. At the very least, I know better counterarguments than the one he prompts you to laugh at. And come on, pre-biasing you to laugh at the opposition may be fun but it's hardly the path to intellectual enlightenment.)
That said, I must give props to putting money where his mouth is in this case.