I guess there's a good chance 'controversial' may be subjective here. However, it needs to be noted that a lot of crypto influencer's views are taken lightly since a lot of then are just shillers or people who think they know too much and keep running their mouth. When Andreas talks, people listen carefully. And that magnifies the controversy of his statements. When he says "ICOs that do these are wasting their time" that isn't something you can easily ignore especially if you are an ICO investor or an ICO startup.
I recommend you watch the whole video. The part about ripple was badass.
Well, you're right. It's definitely subjective, and that it completely depends on the views of the reader/listener.
Personally though, only a very small number of his statements are statements I don't quite agree with. One example is something he said about the next generation not needing drivers because everyone would be using self driving cars or something(I don't remember the exact quote). I don't disagree, but I think it's quite farfetched.
On most of his statements regarding ICOs and other stuff though, I mostly agree with; even though I'm personally not a bitcoin maximalist myself(though still highly bullish on BTC compared to other coins/tokens).