I completly get what you mean, for me it's the same. But maybe it's a good way to show us that not all relationships are perfect,I wouldn't want one like that in real life. Anyways, if they get past the violence and threats it would a perfect development.
I was thinking just a minute ago that I want He Tian to end his violence on Mo. I really like this pair (tho I used to hate He Tian at the beginning too) and I want them to care about each other and treat well. If He Tian stops hitting Mo, maybe Mo stops cursing on every little thing and become "less" annoyed about He Tian.
I still don't know whether I like this pair or not. Like I hate what the relationship is based on (threats and violence). When they seem to have good moments they kinda still go back there and it turns me off. But at the same time they have grown on me (I can't even explain how much I hated He Tian in the beginning...) and I'm interested to see how their relationship is going to develop.