Hello Orkward....I just wanted to say that it seems quite normal to feel a fraud when you have suffered abusive behaviour. However dreadful it actually is, there is always someone who is suffering more than you are: and their case may appear more clear cut, whereas your own story feels full of doubts.
Also, whoever is meting out the abuse is - or appears to be - a lovely person at other times, and is apt to act as though nothing has happened.
And indeed everything else carries on as normal.....so 'it can't have been as bad as I thought / I must be exaggerating / other people have it worse / I don't even think I should be asking about this ' is an almost natural result, and so many women seem to go through it.
My friend left her abusive husband. She frequently felt a fraud: she refused to use the 'a' word, and still doesn't as far as I know?.even though I could have opened any of the books on the subject, and ticked his behaviour off like a checklist. :(
To reconcile my own feelings about it I began to think of abuse as a type of personality disorder. One which happens to be focused on the partner. This helped me create distance from the good person/bad person argument.
But the main point is that self-doubt is all part of it, as is self-blame. But it really, really isn't you that has the problem.