I agree coaches should share part of the blame. Have said Joe Philbin wasn't the right guy for the job since HBO Hard Knock. So there is no issue in my end with Miami deciding to finally part ways.
Thing is even though Miami has handicapped Suh by playing a defense that fails to take full advantage of his skill set, I can't give him a pass for the lack of effort. No amount of rah-rah speeches from a coach were going to change his attitude right now. It's more of a lack of respect for the Miami coaching staff thing than the coaches not giving Suh the motivation he needs.