I don't see why you hate it so much to just bash it.
Because in the grand scheme of things, the movie doesn't really do or say anything significant enough to be worth the money spent to watch it. It's just a fake nostalgia-laden wankfest with poor writing.
Pixels is one of those kind of movies that doesn't really matter if you watch it or not because there's nothing to it besides filler content. It's a gratuitous at best and grating at worst. Calling it the worst movie of all time is sort of an overstatement. I'd much rather call it the blandest, most uninteresting movie of all time.
On the other hand, if you like these kind of movies, Wreck it Ralph or the Lego Movie did the whole nostalgic-inspired theme one better and it's a much more enjoyable watch.
edit: just to mention, just because you like something doesn't mean it's not bad. You can enjoy bad things, that's okay. You aren't obligated to defend your likes and interests. If you liked pixels, all power to you. It's still a godawful movie.
