I will tell you what happened in season 3.
In season 3, her kid was taken...the guy she loved, who betrayed her, abandoned her came back suddenly in her life and then when she told him "i love you", he let her go again. What happened was that she was feeling lost again. She was feeling that everything she loved is being snatched away from her. With Neal, she never even got to tell him how much he hurt her and what it did to her. Given that she lost him way back, but it's frustrating that she never got to tell him how much he damaged her. She never got to tell him that she had to let go of Henry BECAUSE OF HIM. Her pain that she had buried 10 years ago was all coming up...freshening up and she was becoming a lost girl again.
And then she was also in Neverland...a place that has NO FUTURE. Where you are forced to CONFRONT your past. And all of this scared her, frustrated her. She was feeling like a lost girl all over again. It's not because of the lack of love from Snowing...but because she was feeling like she was losing Henry again.
And this is where Hook came in...Hook made sure she was feeling alright because remember, she is an open book to him. Hook knows and can read how she is feeling. And Hook saved David's life because ofcourse it is an honorable thing to do but also because he didn't want Emma to be an orphan again...something that HE FELT HIS OWN LIFE. She didn't want to lose her father the way he lost his brother, his only family. (And also it's beautiful how Hook/Charming found a lost brother in each other).
Emma is not upset at Snowing or blaming them...she is upset at things constantly happening where she is constantly losing everyone she loves. And that forced her to make her feel like an orphan. Watch Snow/Emma scene in episode 2 again. There she says..."I don't know why but it's just that IN NEVERLAND...I don't feel like a savior...I just feel like an orphan". Because she is connecting with the lost boys...THEY HAVE THE SAME LOOK SHE HAD WHEN SHE WAS YOUNG. She is going back to the time when she was lonely and alone...when she used to cry herself to sleep every night.
It's not Snowing she is blaming...but the circumstances that makes her feel like a lost girl. She loves her parents and is so grateful for them loons. You'll see in episode 8 how she was constantly telling them, giving them HOPE (and yes, Hook plays a huge role here) that THEY WILL ALL GO BACK TOGETHER. She is giving SNOW WHITE HOPE. You will see that because she was feeling closer to getting Henry. And she was feeling confident of herself because of Hook.
Then again in episode 10, she loses hope...and that's because how she was again feeling distant with Henry...and feeling how he is in danger and how Hook was not there to support her. In neverland, the one person she constantly looked towards for reassurance was Hook. And she wasn't blaming Snowing...it's amazing that she was telling them how she feels loons.
Look at it this way...Emma Swan is always walls up and no one knows what she is feeling...how low of confidence she is...except Hook and her parents. She can TELL her parents what she is feeling...and that is beautiful. The only problem is that Snow doesn't know how to reassure her daughter because she was never a mother...and that's the first thing a mother learns. And that is what Snow HAS TO LEARN.
The only reason Hook knows how to is because he is kindred spirit to Emma...they both are lost souls, walls up but an open book to each other. They both understand each other. And that is the beauty of all this. It's beautiful how Snow will learn to be a mother to a 28 year-old child.