Haganai was not an enjoyable anime for me. I did not find it funny past a certain point. For the first three episodes the show revolves around the mistaken delinquent and the two "heroines" of the series - Yozora and Sena. These episodes for the most part were quite sharp, and as Sena and Yozora's antics grew and grew, Kodaka's role as the straight man would be stressed further and further.
So it makes sense when dolloping even more characters into the show would have scary consequences. Kodaka's cosplaying sister, a perverse scientist, a ten year old sister of the church who says poop IN EVERY EPISODE THEREAFTER, a cross-dressing maid (whose original gender I can't even remember) - and you know what? There's a line that is drawn eventually where you're just sitting there watching your Mazui subs on your home computer and go "why do I give a shit about any of these characters?"
Your rhetorical question is not easy to answer. It's a bitter reality, but Haganai is just another generic ecchi harem. Kodaka can do nothing to save the show any more. The craziness gets too out of hand for a single straight man, and amidst the chaos you lose the ability to sympathize with any character. Do I root for Sena? She was just so mean in that last scene! But now Yozora's being illogical! Who am I supposed to side with? Thank goodness the nun got naked! That sure helped alleviate tension!
The characters feel too unbelievable for an anime that tries to deal with an actual issue. It's about a group of freaks trying to become friends, except said group is so eccentric that such personalities could never exist. There is no characterization to any cast member as each is treated as a joke. All other reviewers call Rika the "perverted scientist" because that's what she is; nothing more. She has no feelings, she has no emotions, she just has her gags. There is no insight into any of the characters of the show save Yozora and Sena, and the little that is given into them is so cliche and sparse that it's hard to separate Haganai from the thousands of other ecchi comedies.
Haganai just felt like a jumble of too many ideas, too many characters, and not enough depth anywhere. It is a shallow production laden with offensive language and poop jokes. And not the good kind of poop jokes, just repetition of the word "poop." The show struggles with trying to be realistic whilst adding so many unrealistic elements it just became frustrating.
I do not recommend this anime to anyone. It earns 5/10 (average) and has nothing interesting to offer beyond one or two jokes throughout it's 288 minute run-time.
