Before I start frothing at the mouth and fling myself into a blind rage, let me say this:
A show inducing pain and sadness is not inherently bad. If that is being used as a springboard to create joy and happiness or to make you feel for a character, that’s actually good writing.
One of my favorite manga Berserk does this beautifully: I cried for Guts, I wept for Guts and thus I feel for and understand his pain, making him less a drawing on a page and the chronicles of a real man.
I say this because calling Episode 14 inherently bad just because it was sad doesn’t make it actually bad: It proves you care about the characters and could very well be trying to set up for some romantic payoff. The show hasn’t gone full Evangelion yet. Even the excuse of “it makes no sense to separate them!” doesn’t work because we all knew they were gonna be separated by the higher ups anyway. What happens next determines whether or not this is the tunring point in the show being bad but this episode was trying to be sad and it evidently did it’s job well. Whether or not it uses that well is up for the future but again, standalone it’s a good episode.
Now, onto the uncontrollable rage part: