Yeah that's what I thinking about too, most people she was judgmental about in the beginning, she never met or came to know. Her classmates however, she has come to appreciate and become fond of, so she isn't unlike Chie. Furthermore, we haven't seen her rant about the fluffy-haired girl anymore. It'd be more accurate to say she accepted she was wrong in her perception of that girl, and stopped.
As someone else mentioned, she has yet to meet again that girl, so we don't know if she learned her lesson or not as for her.
I'm kinda worried that this going to turn into something similar to Honoka. And I think most of Oonoda's angst against people are one-time only : she meet one or several people doing something, goes into her angsty routine of "they do something that I don't do or not as well, they should go die, poor me, boohoo !" then find some mild resolution (usually messing up or realizing it's not as bad as she thought it would be), then start over all over again the next encounter.
Chie seems somewhat different in that regard because as far as we saw, she was like that only with Ai. All we saw after that "incident" was Chie getting along with pretty much everybody, be it in their classroom or outside (like how she naturally talked with the saleslady when shopping for swimsuits). For all we know, that might just have been Chie being in a bad day when she started to pay attention to Ai.
I do hope Oonoda will get "better" and stop being so damn judgemental because as entertaining as it was at first, it got annoying for me how he stick to her character like that and I tend to skim over the chapters focusing over her when I usually enjoy reading most of the other girls a few times. It's my personnal preference speaking there, of course, I simply find these kind of character aggravating and Honoka is already annoying enough, but her own story arc is amusing enough despite the pairing to balance it.