I'm sorry, but in my opinion that can only possibly be due to the emotional baggage you already carry with you regarding environmentalists. Could you not handle Mulan's feminism? Beauty and the Beast's message of beauty being more than skin deep? Virtually every Disney film ever made has an overarching message--a moral of the story.
Wall-E didn't make any specific arguments. It didn't talk about global warming. Didn't rail against the petroleum or coal industries. The only message Wall-E delivered was, "Take care of Earth." It absolutely got no more detailed than that. Presumably that's not a message you find overly offensive, especially stated in such general terms.
And even still, it was barely even touched on! Wall-E is about a love story between two robots. Only a tiny fraction of the movie, a tiny fraction, even deals with environmental issues.
This post isn't just directed at you Chad. It's been tumbling around in my head since Wall-E came out. I've talked to a number of people who simply refused to see the movie to begin with. "If I wanted to be preached at . . . blah . . . blah . . . blah." It's crazy. You're gonna get preached at in EVERY movie. They all have some point they're trying to make (hopefully).
I know you saw the movie, and I'm not trying to tell you what you think. But I do believe that your opinion reflects your expectations going into the movie, rather than the reality of what the movie was. Cos that movie was not preachy.