Each customer has a right to be disappointed. I understand how you feel. I would be extremely disappointed if the chips did not fall right and I missed my opportunity. In your case, you're not entitled. However, there are people that are getting angry at Disney for reasons such as waiting in line for a ride that isnt open and mad they could not get on it, upset at Disney for not having it open and pointing fingers / blaming. To be mad and blame Disney for dragging heals, not having a soft opening, or whatever feeling similar is obnoxious. There have been commercials, e-mails, teasers, but they have only said it'd be open in Spring. Even though it was 94 degrees today, it's still spring.
I hope that everyone has an opportunity before their vacation may end. Disappointed is a feeling that I would have. However, blaming, being angry at Disney, getting upset at CM... that's a bit too much.