Nothing is more ridiculous than you smothering this thread with your expectations. Why should she show "gradual" change? You do realize this is an action-CBM with just under a 2 hour run time and on up until Scott Lang was victorious, there was no reason to be a believer. Again, this has nothing to do with anything missing from the movie. It's a personal preference of yours. Major life-changing events like the one that transpired at the end of the movie is indeed enough to change a person's mind.