I loved Pixels and the Ninja Turtles movies. The trailers did nothing to deter me from watching them.
I never trust a trailer, and anybody basing everything on it should not be taken seriously whatsoever. If he doesn't want to review it, that's fine. There is no reason we should care, though.
And yes, he wanted to stir up controversy entirely. That's how his video got so much ad revenue. There's literally no reason to post the video otherwise. The more controversy, the more views. It's extremely simple in that regard. Problem is, it came with downsides, namely the threats, which are always unjustified.
You can't judge jack from a trailer. They're worthless for anything but making it so people know of the movie's existence. The only thing that matters is the final version, period. Rest does nothing at all. Reviews are useful, but are sometimes full of bias and even states a lot of incorrect things. I only trust one thing, my actual judgment. People need to trust that more than bad reviews and inaccurate trailers. I was vastly surprised that the Goosebumps movie didn't end anywhere near what the trailers suggested. I got a pretty different feel from Pixels after I saw the trailers. Hotel Transylvania 2's trailers were very misleading, especially about Dracula's dad and his purpose in the story. I learned quite quickly how useless trailers are for anything but hype/interest in the existence of the movie. That's pretty much all they're legitimately good for, after all.