Looking at your moderation history, the only moderation you have is over two months old. Still, it appears that you used a number of negative terms in your post itself, not just the title. Flat-out calling elements of a show "garbage" and "dumb", as well as the title itself, seems designed to provoke fans into hostile reactions. As you say, boards involve negative and positive discussion, but your post was only negative, and used inflammatory words to make those negative comments.

The following is a good guide to what is usually considered trolling at tv.com in any case.

Most likely, the concern was that you posted a review rather than a discussion topic. When posting negative comments, much less creating a new thread to post only negative comments, what any user should look at is, when you're using a show's discussion board, what are you trying to discuss? You came in, called the show stupid, and said nothing but negative things about what you had seen, using "loaded" negative words. You didn't invite feedback, and you didn't seem open to having your mind changed. All of that inevitably will provoke people who do like the show, and wish to discuss the positive and the negative.

Also, if you're posting to discuss, you have to ask yourself how what you're saying is going to lead to discussion. If someone responds and suggests an alternate viewpoint, would you consider what they're saying and possibly change your mind? How is what you're posting going to convince people who like the show to think otherwise?

You essentially posted to vent, and that's typically acceptable as a review, although you might want to provide some constructive criticism as well. If you wish to post your original content as a review, that would be fine.

It looks like everything above was taken into account, and the consensus was that your post would lead to flaming rather than discussion.

Hope that helps.