Yeah, after 3 seasons of this I am never watching harems in my life. Specially so poor written ones. This is the Kimi ni todoke of harems: it's going too far for too long. I couldn't even tell if they were making a parody or just plain copying characters from other animes (like Kore wa zombie desu ka, NGEvangelion).
Wouldn't try to watch it again, 3 seasons was way too much for me.