Because the character arcs don’t make sense. Also the author has glorified the cheators. The cheating couple…
i can agree with the cheating issue but the lead couple satisfied me. They felt realistic and at the same time i liked how they accept each other gradually, it was enough for me. And yeah youre right about the family issues, in fact, i like watching anything involving family problems so much that i sometimes forget about the things i dont like in some kdramas.