I tend to agree with Lord_Zed.
We all know and acknowledge Bay has made several questionable decisions in regards to the portrayal of the franchise, but there is no doubting his dedication.
I don't see him deliberately sabotaging Transformers and getting fans offside - I mean why would he when this is something that puts food on his table and petrol in his Lamborghini
If I were a director, I would want to make a film that appeals to the average consumer and fans alike to maximise my investment and return. Unfortunately, as with most things, you can't please everyone all of the time.
If the intent was to make a film targeted at the fans, you run the risk of segregating the casual moviegoer as the themes and mythos portrayed might not appeal to everyone.
I just accept the movies for what they are and appreciate the fact that without them, there would not be a renewed interest in the franchise potentially meaning no new product. For this, we should be thankful.