A recent chapter where she wanted to see a penis live... not a problem. You know, that's fine and all. But looking up dicks on your phone during class? I know curiosity and urges and all, but that was just a no-no. I know she's a virgin, so am I, but try to keep yourself from checking it out during class!

She went into her brothers room and asked him if she could see his penis i just died at that part

She learned she doesn't need to be popular or fit in with societal norms to be happy, that seems like a pretty good lesson to me. Considering most of her misery was self-inflicted, a large amount of it coming from her misguided attempts to be popular, it gave me the impression that she'd be okay once she stopped trying to impress the world. She did have a couple friends like Yuu and Megumi who liked her more or less how she was, she'll eventually find more just by being herself.

That's not to say she shouldn't reach out to others at all (though she is slowly improving in that regard, too; compare the way she said goodbye to that teacher at the front gate in the first and last episodes), she just needs to quit being such a tryhard about it.

That would be fine, expect for the fact that she pretty much accomplishes nothing in her life. She still can't talk to people, she ran away from Megumi, and Yuu even lost her attention for Tomoko over a cat.
Some of her misery IS self-inflicted. I'm not denying that. But a lot of it also has to do with her simply being in bad circumstances or just naturally having poor social skills. I can tell you from first hand experience that you can try as hard as you can to make friends or make your life "better," but most of the time you'll fail. I never pretended to be something I'm not, and it didn't lead me anywhere regardless. I'm lucky as is to have my girlfriend now, and that only happened because of sheer luck. Almost nothing on my part. So yeah, Tomoko simply saying "None of it matters." was not satisfying to me at all. I'd like to still see what her life is like after that, though.

She didn't say "None of it matters", she said "Who cares if I'm unpopular?", which is the right attitude to have. And I'd still say Tomoko grows slightly over the way she was at the start of the series. She had hardcore issues, though, and the show only covered five or six months, half of which was over summer break, so expecting much more than very subtle changes seems a little unrealistic.

She didn't say "None of it matters", she said "Who cares if I'm unpopular?", which is the right attitude to have. And I'd still say Tomoko grows slightly over the way she was at the start of the series. She had hardcore issues, though, and the show only covered five or six months, half of which was over summer break, so expecting much more than very subtle changes seems a little unrealistic.

Nope, just checked. Her exact words are "Seriously, it doesn't even matter." To me, that's the biggest problem of the series. It's way too short. This show would at least need another season to show Tomoko's full journey. But since the manga isn't even finished yet, I'm not sure where that's going. "Slightly" isn't a huge change in my eyes. Which to me, means that she doesn't change or mature enough. Just my opinion, though.

I have to say, though, doesn't "Seriously it doesn't matter" actually mean that her not being popular is not something she should bother with? Yes, it's short. I don't know why they made it, since the manga is obviously taking a lot longer, but they shortened it. And even if it's short, as long as she realized - even over a short course of time - that trying to be popular is tiring or just doesn't matter since people popular isn't important is actually pretty good. I mean, you don't need a long anime series of 50+ episodes to give a message, especially since it become tiring to watch that since you know what the message is probably gonna be and the longer it takes, the more you're frustrated that it's taking them so long to finally get there.

I can see why people think it may be lacking, as it is pretty anticlimactic and sudden. But I guess her seeing Imae's underwear when she was about to actively reach out to a person - something she hadn't really done in all the episodes and almost none of the Chapters up to now - was kind of a pretty big shock to her and she kind of cracked.
But I think it's an okay ending. I think I'd say the Ending for me is either her saying it doesn't matter if she's popular in her class... or it doesn't matter if she, or anyone else, considers her a Mojyou.