Re: all my opinion of course
He really hates the ending. He thought it was making too much out of Batman and Joker; he feels it's an example of his worst tics; and he really regrets crippling Batgirl, and the part of that which made him really regret it was when (reportedly) an editor, Len Wein, actually said with delight "Yeah! Cripple the bitch!"
But that must be seen in the light that was a different time when characters like Batgirl and Supergirl were looked upon as silly redundancies. Remember, they were so hot to kill off Robin a long time, and one could argue that getting rid of all stuff they thought of like that in the DCU was the whole point of the Crisis. Not that it's not an ugly sentiment, but it was more than mere misogyny.