The guy of the story Welkin is just an out of place kind of person who knows nothing other than biology and can't express himself...
While fun at first this becomes dull and monotonous as the story progresses and becomes a little bit infuriating at times...
His friend Faldio an archaeologist seems like a kinda fun guy but soon you find he is not...
Faldio likes to embarrass the girls he likes in this case is Alicia, he starts to take a liking to her and soon enough embarrasses her with a few things...
Most of these reasons alone are not enough for someone to stop watching an anime but when you force all these things and keep making the main characters be either arrogant or disconnected the whole time it becomes sour...