2/2
(Also; Meredith didn’t sleep with George out of self-pity. She was emotionally messed-up, maybe even drunk and wasn’t thinking straight after everything that happened that day. She thought it might have been a good idea and George decided to sleep with her too. He knew she wasn’t into him, so why did he do it anyway and blame her for a mistake he they at least both made?)

On itself there is nothing wrong with being dark and twisty and having intimacy issues. (It are everyday problems that a lot of people have or can relate to). The problem with Meredith is that they dragged it out too much. Everything that bad that could happen to a person happened to her (season 3) and then her intimacy issues were suddenly too much for her to be in a relationship while she admitted that she could overcome those after she drowned. I never understood why Meredith never discussed her drowning in a serious way with Derek. I think the real issue here is that the writers didn’t give Meredith the right material or they don’t have clue how to explore issues in the right manner.
I think the author of The Hathor Legacy article is incredibly wrong. Meredith does not get portrayed as “ a goddess” on the show at all, she has been presented as someone with who has issues since the first episode. She doesn’t walk around SGH like she owns the place and she doesn’t come across as the kind of person every girl wants to be like or envies. No one is forcing all the viewers to like her, it always has seemed like the writers were set on making viewers hate her.

I don’t get what you tried to convey with Meredith almost never apologizing. She apologized to George (season 2) multiple times when she didn’t have to. (It takes two to make a bad sexual decision).
She apologized to Derek for shutting him out in (season 3) and she even promised him that she was trying to get better, hell she even practiced her apology. Other than her fight with Cristina this season she never rally has any real fueds with other characters, so why apologize when there rarely is anything to apologize for?

You should read this Ellen Pompeo interview that she gave around the same time Shonda gave the one you referred to. This just perfectly shows what Shonda’s shortcomings are. Like you said it’s okay if she wants to put parts of herself into the character.
The problem with the show is that characters and storylines are not in order and the writing doesn’t seem to add up most times. Look at the end of this season. Meredith first says yes to Derek’s proposal, Meredith starts planning a wedding and seemed really into it, Meredith doesn’t want the chruchy wedding, Meredith wants to get married after Izzie’s operation in the Bahamas or something like that (first scene of the finale), then she want to go to city hall and then she doesn’t marry at all and Shonda tells us that that the last thing Meredith Grey would do is put on a wedding dress and walk down an aisle.
If that’s really the case why go on and on about the wedding for six episodes and have Meredith say yes to a proposal and start planning a wedding. They shouldn’t have had that storyline at all in that's case. All that time could’ve been used for a significant MerDer or Meredith storyline.

Meredith continues to improve next season so that she can finally prove why she's the star of the show to begin with

I hope so too, but in order to have that she needs to get treated like she’s the star of the show by the writers.
(Sorry for the ridiculously long comment, but I needed to get that out of my system after reading your piece. JMO)