Weak heroines

What makes a heroine weak in a reader's eyes? When she doesn't stand up for herself against the hero? When she doesn't walk away from her mother when she's being picked on? When she lets the hero hurt her emotionally and still goes back to him? When she's hurt by a friend she trusted? I've had all those situations in my stories and while some readers love them, others hate them - with a passion. I wonder if they realize how lucky they are, that they feel strong and confident and in control in their relationships that they despise women who aren't. Most women do put up with more than they should. My heroine in Doing the Right Thing is very down trodden. I was like that. She was based on what it's like to be the one left out, the one others make fun of, the one with no friends, the one boys never pick so when you find one that seems to like you, you hang on as tight as you can and forgive maybe more than you should. I don't think that's being weak, I think it's being realistic. We can't all be alphas.
My heroines are all flawed characters. I think that makes them more interesting. If you want perfect Alpha Queens, I'm not for you.