just finished Elfen Lied again

so me and my friends just finished this anime (this is my second time watching it) and my friend who has never seen it (the reason we were watching it again) didn't like the ending I'm wondering what everyone else thinks about it and if it's worth my time to read the manga as I heard it goes farther. Last I've heard rumors of a season 2 and wondering if anyone can confirm this.

Why would anyone willingly subject themselves to more torture? Every character in that series is morally bankrupt or beyond incompetent. Nothing in that universe is worth salvaging as even the creators wanted a show of pure misery and spite. Where no one was good, just vaguely morally grey. Outside of the music that show has zero to offer. In addition the manga is just as worse. Yeah the two cousins have an incest baby that has the Diclonius Virus implanted into it by Lucy. That's nice of her, haha! So yeah. Bury every copy of the DVD in some hole out in Arizona and burn the books like the trash that it was. *spits on it*