I wouldn't really call Seth Rogen's characters very endearing either. I agree that she's not trying to be endearing, but neither are Don Draper or Walter White. People are saying she's a spoiled brat, as if that's some sort of flaw in the show, but that's the entire point of the first episode.
I'm not saying that her being a spoiled brat isn't a flaw in the show. I just don't find the idea of a show about a spoiled brat coming to terms with reality to be very intriguing, personally.
Does the show really want to be edgy and ground-breaking though?
Lena is just writing the show she wants to write, I don't think she's going out of her way to add sex scenes to be edgy, but she could be adding them in just because it's on HBO, I feel Game of Thrones has that problem with some unnecessary scenes.
of course I can't say for sure whether the show is trying to be edgy. All I have to go on is how these scenes appear to me. By throwing that fairly graphic and awkward scene in the second episode felt like it was meant to be there in order to shock viewers. No lead in or anything, just BAM, naked Lena Dunham.
I feel like I'd be able to enjoy this show more if I hadn't known that she was the writer. I can't disassociate her from the character she's created. It's like "yeah im not conventionally good looking, but I'm gonna put myself naked on TV anyway! Yeah!" It's too self-aware.
It kind of reminds me of Seth Rogen's character in Superbad. It was alright, nothing to phone home about. But then I read about how hard he tried to make himself look young enough to be one of the main characters, but was unsuccessful. From that point on, the majority of the scenes involving Rogen's character just felt like him trying to give himself more face time.
I realize that my criticisms are pretty deeply entrenched in my own personal feelings though. I don't particularly like the show, but I wouldn't shame anyone for watching it.