I do think that she didn’t blame Louis when she said “selling out for a tiara”, but seeing that she accused Chuck of buying her and selling her in 5x14 and 5x19, I couldn’t help but taking the IP reference “badly”. She has every right to mention it whenever she wants, and however she wants, though. That’s not what bugged me, personally. I’m just over watching her going around in circles, asking people to tell/remind her who she is. English is not my mother tongue, so this may not have sense at all, but even in the final scene with Dan, she asks him to remind her who she is, she says “I want to be found”, not that she wants to find herself. It’s like she’s waiting for someone else to find her… when *I think* she needs to start working on herself by herself. Or that’s at least what I would like to see. She gave up control on her life at the end of S4, when she accepeted Louis’ proposal, and I haven’t really seen her in control since then (just briefly in 5x14). She’s just… passive. She wasn’t at the beginning of this episode, and then she was again by the end of it. That’s probably why I didn’t feel like she was blaming herself when she mentioned the IP.
(I also think that the writers are taking every possible chance to remind us of the IP. They clearly got a huge deal of backlash for that storyline, and it only seemed to get worse when Dair came into the picture. I always feel like they want us to know that they know how important the IP was, that they didn’t forget, that they know what they’re doing. And I also feel that’s why Blair keeps accusing Chuck in these episodes. It’s like they want to anticipate what Chuck haters will say, and make Blair speak before them. I felt like that when Blair accused Chuck of selling her/buying her; also when she refused to help him in 5x19 telling him that there’s always “an agenda” hidden somewhere in his actions. It’s like they want to take care of every possible aspect of Chuck and Blair’s relationship right now, like they don’t want to leave any material to CB haters. Which may be a good thing for CB, so… I’m not really complaining. At least I saw the Blair I used to love at the beginning of this episode.)