Direct quote from wikipedia:

Reviewers often criticize Bay’s films for relying heavily on visual effects and suffering from clichéd dialogue, flimsy and formulaic narratives, numerous scientific and historical inaccuracies, illogical plot developments, and lack of character depth.[54][55][56] Bay contends that he is not discouraged by such criticism and that he aims to provide enjoyable “popcorn” entertainment to movie-going audiences.[46] Stating that he is “a filmmaker, not a scientist”, he creates his own fiction based on actual science or history to make the messages he sends “more exciting”.[57]