Let's see. Insightful/compelling/novel elements of Banner/Hulk that were strictly script-related...
And this is just off the top of my head...
Ruffalo's performance was great. But without the writing of those elements and others, it would've left me just as cold as the previous two hulk movies did.
You're welcome to your own opinions, but because I saw SO much in the film that was different/better/sharper/more developed/funnier/clearer/more structurally sound than the previous characters' movies, your "it's a complete misfire" response comes across to me as contrarianism, as opposed to thoughtful criticism.