Ohhh! I like this thread! And I do hereby inform you to prepare yourselves - run you fools! - for what will be a LAP 
I think we can analyze the whole mess in two ways:
1- Blame the author don't blame the characters, and this is all fine and dandy but after we've said that Kishimoto is a terrible horrible god-awful writer who can't even remain consistent to its bigger plots point we are not left with much else to say but continuing critiquing the author.
2- Try analyzing the behavior of the different characters as if they were almost - but not quite - real. I do actually prefer this one, even if we have to deal with some apparent schizophrenic behaviors, it is definitely more interesting and can be expanded and played with much much more.
Rather than blaming Sakura I'd be much happier to see people frustrated with her behavior. There were some great posts few pages back - but alas I'm too lazy to go back and quote them, do pardon me for that - with which I agreed completely.
Getting very frustrated with Sakura's behavior is fine, and even right, but blaming her? Not at all. It's exactly like blaming an abused woman in RL - with all the due differences between fiction and reality of course - someone who's sense of worth is literally zero and that, if we follow Naruto's storyline, no one really encouraged to put things in perspective and see how dangerous and toxic that person was for her.
I seriously don't remember anyone, not her family, not Naruto, not Ino or Kakashi or Tsunade or whoever else, telling her to really take a step back and analyze her behavior and realize how bad Sasuke's influence was impacting on her self esteem and her person in general.
In this she's very much like a dog, no puns or malice intended, but as a dog gets positive reinforcement for its 'good behavior' so did Sakura, she got 'positive' reinforcement too, because there is this toxic mentality of 'enduring' and so, good girl, endure it, endure it all, atta girl! Have a cookie!
I do believe she'd have some obvious self-worth and self-esteem problems, as said in a previous brilliant post, and that's the POINT of her character, because becoming 'stronger' doesn't simply mean learning to shatter the earth with a punch or becoming a physically stronger and deadlier shinobi, she had to overcome her psychological problems. We, I, thought she did, but nope apparently she tired, she almost did it, she was there, but she didn't succeed (we can thank the all-mighty 'pen-holder' for last the minute out-of-the-blue changes here).
That's why I'm a bit perplexed by what some people say, I do understand and agree that she isn't blameless, saying that would be stupid, but the 'she made her bed, now she should lie in it' attitude is a bit cruel, at least imho. I pity her, I pity her very much, she's stuck in a ugly situation and she doesn't have the strength the psychological fortitude, or even the stimuli and the help, to get out of it.
When dealing with a situation such as hers it's easy for a 'stranger' to think she should get out of it, that the decision to get out of 'it' should be an easy one to take, but in truth when one is in the loop it is not easy to get out of it, especially if she lives in an environment that doesn't help her at all, and that is even detrimental as it pushes her in the exact opposite direction.
As for guilt-tripping Sasuke.....(she might have tried, I honestly don't remember and should go back to check the chapters, but I'd actually rather go gurgle some turpentine) I don't see how that would even come to be, I mean, he really really doesn't give a fig about her, she could be hysterically threatening to fling herself off the Hokage mountain and he wouldn't spare her a second thought. Those two, as they were developed by the author, are clearly WRONG for each other, a proper textbook case of toxic relationship.
As for the issue of Sakura's fan defending her until and beyond reason, you are right - I just spent one odd hour trying to psychoanalyze her behavior into something that makes sense and this must account to something - you are absolutely right! But as said before it's because many of us perceive she's been given, again and as always, the shortest end of the stick and in that ends-backward finale, hers is the really sad story.
Hinata has all she ever wanted even if she lacks the grey matter to understand that her 'ending' was quite pathetic, and Naruto, if he de-glues his bum from the Hokage's chair, has a super-moe subservient (scarf-knitting and cake-baking) wife that thinks the sun shines out of his as* and two healthy children, however ugly and unlikeable. He has a family, he has his position as the Hokage, and apparently he's still in contact and in good relations with Sasuke. That's pretty much all Naruto wanted, even if the girl is the wrong one and all seems kind of 'wrong'. Everyone else in Konoha is married and eventually spawns children and, unrealistic, cavity-inducing and cliché as it sounds is mostly happy.
And Sakura is still the practically single-mom housewife, with loans on her back and a Houdini-esque husband, whom she hadn't even seen for 13 years before the start of Gaiden and who goes away again just the day after returning for the first time, and he didn't even return all that willingly, but came back due to circumstances out of his own control......
Peeps, sincerely, as the super-corny, unrealistic, cavity-inducing and cliché finale....one must admit hers kind of sucks. This is what I perceived from Naruto 700 and onwards, it might very well be my interpretation of things, but be as it might be I do truly think it sucks, and that's why I'm frustrated with and aggravated by Sakura, that's why I pity her, but blaming? Nah.
Or we could simply say that this is all Kishi's fault, but that would mean I spent an hour writing about nothing....
And where would be the fun in that? And more importantly, this fandom and this place, practically a year after 'THE THING', should be more or less deserted because after some time talking about how bad of a writer Kishimoto is - and I do think he is bad, I do, I do, I do - there would be simply nothing more left to talk and debate about, and honestly I'd rather see this place not abandoned.
Now, I'm beat and I'll happily march off to bed.
I hope the english wasn't too contorted, and G'night/G'day/G'afternoon to Y'all. 