Ane

I couldn't agree more with you. From the beginning, I thought he had rather unhealthy feelings toward his younger brother. So much so that he wanted the only thing Xu Feng really desired, Jim Mi. Xu Feng never wanted to be emperor. The empress said several times that she doesn't know how she gave birth to someone without the same ambition for power. Run Yu always had a lot of self-pity and liked to boast about his position and situation. To me, he was less kind and more weak. It was gaining power that revealed his true shape/nature (in this sense, I loved the metaphor in the drama).