But as seems always to be the case lately, I went home and the first thing I read applied directly to my worries. Here is Adorno from the second section of Minima Moralia:
[epigraph:] "Where everything is bad it must be good to know the worst." --F.H.Bradley
Memento -- A first precaution for writers: in every text, every piece, every paragraph to check whether the central motif stands out clearly enough. Anyone wishing to express something is so carried away by it that he ceases to reflect on it. Too close to his intention, 'in his thoughts', he forgets to say what he wants to say.
No improvement is too small or trivial to be worthwhile. Of a hundred alterations each may seem trifling or pedantic by itself; together they can raise the text to a new level.
He goes on to make several more good points, and I'm a little happier knowing much of my poor writing is my fault, rather than a result of my faults; that is, I don't think this is a problem of inadequacy but a sort of inattention.
And I didn't say anything nasty in that whole post! :)