You either barricade yourself behind a wall of completed work…or you retreat into excuses – both are perfectly valid.
The first means that you have not disappointed your readers – at least not any more than you normally do. If your entire readership is composed of disappointed people, you have my sympathy.
But by fulfilling your obligations or promises, you only make a stick for your own back. Do good and they’ll expect it of you all the time. Keep topping yourself and one day you’ll be over the top.
On the other hand, if you retreat into whiney excuses for non-performance people will be disappointed in you…oh, wait…they were disappointed in the first example as well…
Have you thought of getting a better set of readers? People who are less judgemental? Might be a thought…
But anyway, let them down occasionally and they will not be on your ass so hard each day. This will give you time to gather new material for a glorious comeback. Because that is the real secret – if you cannot break a writing block you need to go out and find something that breaks it for you. It can be any person, event, place, or experience that makes you mad, sad, glad, or bad. If you are sweating internally, you have a live topic. And you can make it go for ever so long as the powerhouse for your work.
As you explore it and draw from it, the readership will respond. Some will agree, some will not, and some will be disappointed. That is the best indication that you are back in the groove. Go on – give ‘em what they don’t want. They’ll love ya for it.