Why are people comparing Charlotte to Angel beats? Angel beats was rushed towards the end but it was still relatively good and had great potential. Angel beats at least had "da feels". In Charlotte, however, making a victim of suffering look like he's having an autistic seizure with filthyfrank-style singing will unfortunately not making the audience feel emotional.
I can sort of understand why you would compare some elements in Charlotte and Angel Beats 'cos like the ending of angel beats, the episode of charlotte last week was like an amateur quickie inside your parents' room and you had to rush to the orgasm quickly before your dad finds out you're fucking your step-mother. Basically, the climax wasn't as good as it could have been and you've just left a big sloppy mess that would be hard to clean up.