If people didn't like it, WOM would suck and so would the film's legs. Transformers is here to stay. HOWEVER, I think every nonTransformers fan that saw it at the movies had pretty low expectations for it, sense in all fairness the entire franchise was created 23 years ago to sell toys. So, that being said, the sequel needs to be an all around better film or it will not experience the same success as other sequels (like Spiderman 2, X-Men 2, etc.)
Anyways, Spiderman's numbers are safe and will be the box office king for third time.