He barely mentions it, but the entire point of this conversation, is you making the claim that he blamed the audience for BvS. And yet, he didn't. He was answering a question about Watchmen, and then his thoughts on superheros being deconstructed after Watchmen. That's not him blaming the audience at all, that's him explaining his outlook on superheroes, due to Watchmen. The question was about Watchmen, his answer was about Watchmen. He was at a Watchmen screening, and the entire Q&A was about Watchmen. Just because he had to juxtapose his thoughts on Batman, doesn't mean he was "blaming" anyone about BvS, he was just getting to his overall point about Watchmen. He even ends it by saying it's fine if you like your heroes more innocent, but he sees it differently because of Watchmen. That's not placing blame, that's just an explanation of his though process on where he thinks superheroes are after Watchmen. The entire point is about Watchmen...it isn't even about BvS.
Honestly, how are you reading it differently, knowing the full context? Sure, if you cherry pick one of those paragraphs out of context, you can read it in the most uncharitable way you see fit(which is precisely what you're doing). But I don't understand how you can still just double and triple down on this, knowing the full context of the situation? It's just bizarre to me.
Now, if you want to disagree with him, by saying he shouldn't be applying his outlook on superheroes after Watchmen, I can understand that, but that's not the point of this.