If this movie had had the same elements, but a different universe that Transformers, it would have gotten a lot less attention and hate. People would just have brushed it off as another bad movie and moved on. But because it's Transformers, people expect it to live up to their glorified memories, as if anything ever could. Most claim that their childhood is being raped by it, but really, if can only do two things.
1) People realize that the original Transformers wasn't as good as they remembered, which is not the movies fault.
2) People still have glorified memories of the original Transformers in which case they should stop whining so much, get over the fact that someone made bad movies, and savor their memories instead.
Really, people just whining too much about something that they could easily just move on from. I catch myself doing it often too, but I usually wisen up and move on, which people should do in this case aswell.