No. She isn't. I've read all the comments in this thread thus far and I believe that the only realistic things about sakura as a character are her latent feelings of insecurity, disempowerment, and need for acknowledgement. That's about it, other wise her behavior seems to be more consistent with that of women who are in an abusive relationship. I understand that this comparison maybe a bit extreme for some so I'll be more than glad to break it down for you.
1) There's a difference between unconditional love and being blinded by love to the point where it has a negative impact on the individual experiencing it. At what point does an individual begin to evaluate whether their feelings are really beneficial to their own well being or the well being of others involved??
It's typical for emotionally/physically abusive women to experience a phase in which they sympathize with their abuser to the point where they're willing to make excuses for them. Sometimes it can even get to a point where the victim begins to believe that what their experiencing is their fault and that a person who they love and care about is being reprimanded by others because of something that they've done. At that point the victim feels responsible for the abuser and sometimes will even take on partial responsibility for absolving any negative predisposition towards the abuser. This isn't a genuine relationship it's a codependent relationship built upon the victim's fear regarding what they may or may not be able to provide for themselves. They're so insecure and disempowered in their own lives that they're willing to seek empowerment and validation in people that showed them even a smidge of attention before regardless of the emotional or physical abuse they may face from the person.
2) It's common for victims to feel responsible for saving their abusers or redeeming them in some way, so part of the reason they're willing to endure so much abuse is because they believe that it's not necessarily part of the person's nature or that they're only behaving that way because of hurt or loneliness so at that point the victim feels obligated to stick by their abuser's side.
So no. I don't think sakura is a realistic portrayal of women and it isn't fair to compare women to someone who's so desperate and disempowered. If other women feel as thought hey can identify with sakura that's their call. I can't make that decision for them, but I know that I have control over my own perspective. Personally, I could always identify more with Kakashi. The saying"conceal it, don't feel it, don't let it show" plays a huge role in my life plus I'm more of a strategist. I don't believe in resigning my personal power to external circumstances.