One time I even used a BF destroyer on a girl and it still worked.
Basically, she wondered why it didn't work out with her ex. I ran the idea that he was too comfortable in the relationship... like they were bros and sister. Turns out that she took the role of leader in the relationship (planning dates, taking care of his errands etc). But she had been getting tired of doing that. So I flipped it and said "oh I see. So maybe you were the one who got tired and didn't want to work at it anymore. Maybe you became a little lazy and they couldn't handle not being led."
So it was like I devalued the ex while at the same time showing her that maybe she got complacent at her leadership role.
Women love to hear feedback about themselves. Also, they like when guys give them ideas on how to improve themselves.
Then I explained how I've always been able to take the lead in a relationship and even share it at times. Something that told her I am OK with her taking thelead but also i am naturally going to take the lead most times. I gave her the freedom to lead but reassured her that i will lead if she doesnt.