Now you're creating a strawman.
I'm not talking about limiting your creations based on your real life experiences. We're talking about viewing something in its entirety before criticizing it.
If you attempt to attack anything without viewing it, be it a movie, a book, or a comic, then you are attacking it based on incomplete information, often on heresay (such as those people who parrot the opinions of better paid critics). In your journal, you admit that you've drawn your conclusions based on trailers and interviews.
You do not have a valid complaint with the movie yet. Do you have a valid issue with the premise? With aspects of the movie observable from the trailer, such as the design of the Turtles? Absolutely. But at this point, your opinion about the movie as a whole is invalid because you are jumping on a hate bandwagon.
Was TMNT any good? Eh. Was it terrible? Another eh. To me, it hovered in that little pocket of mediocrity reserved for films that have zero impact on me, but don't offend me. However, unlike the conclusion you've drawn in your journal, it is a conclusion based on viewing the entire film.