You can be a nice guy without being a passive one. I believe a WAW in an A hates passivity so badly that it causes her to act out even more bad behavior b/c in her heart she wants to see what it would take for her H to stand up to her.
I am always interested to read your comments since you have been the person on the other side of this whole thing, BUT, be careful not to take your story and apply it to every other sitch out there. Every situation is unique.
One thing I never had a problem with was standing up to my wife, in fact, our relationship was the complete opposite. Her inability to stand up to me, is what broke her down. Then she finally took all the bottled up frustration and exploded.
BITS
Happiness is not something ready made. It comes from your own actions.