Emma does not, subconsciously, use Miss Bates as a whipping girl, so to speak, for Mr Woodhouse. Mr Woodhouse is every bit as tedious as Miss Bates, if anything even more so, and possibly Emma sometimes feels annoyed or frustrated with him in the back of her mind - she would of course never let such feelings advance to the front of it. Indeed, it would take a saint, which we know Emma isn't, not to feel some ennui on having to repeat the details of some plan ten times before Mr Woodhouse accepted it, or hearing him speak of happily married women as if they were objects of pity (Poor Isabella, poor Miss Taylor) or reproach them gently to their faces, as in Chapter 25's "Ah! Miss Taylor" [here mis-addressing Mrs Weston] "if you had not married, you would have staid at home with me."