Why are so many people unhappy?

It’s like, definitely uncomfortable, because each character has their own trauma. But like, this is what having an adult relationship is like? Like sometimes you step on your partners trauma by accident because of your own, but being mature and in a relationship means trying things, even if they don’t work. They’ve not even really known each other that long when you think about it. If this manga was tagged jousei, I feel like people wouldn’t be so confused or disappointed in the depth that their relationship drama is going.