most online fan criticism that says "he should have done this" or "he should have run that play" or "he should have called a timeout" or whatever. Anything that is a fan second guessing a specific play or decision is ridiculous simply because of a) hindsight and b) knowledge.

Hindsight: Knowing that a particular play call or decision did not work does not mean that whatever you think he should have done instead would have worked.

Knowledge: The coaches have so much more knowledge generally, as well as specific information, that a fan telling them how to do their jobs is silly. For example, a fan doesn't know the other team's tendencies for downs and distances. A coach uses that information to inform their decisions. Etc. Etc.

I don't care if fans complain about the overall results - but don't try to pretend you know the reason for those results and/or what should be done to get different results.