As a non-american guy that has never seen John Oliver before, I found it very hard to sit through the entire thing until the end, though the payoff was definitely worth it.
This guys looks to me like he's been in TV for a little too long and tries very hard to find a audience with very simple jokes (that feel kind of forced) amplified by background laughter.
He has the right idea and did the right thing but I personally would have found it more enjoyable without the jokes.