Why is Qianlong so heartless to his two queens?

Emperor Qianlong was the emperor of the Qing Dynasty. His first queen was Fu Cha and his second queen was Nora, but both of them died young for some reasons, and Emperor Qianlong didn't like his own queen, especially the second queen, Nora.

Emperor Qianlong liked Fu Cha very much and treated her very well. He was awarded the title of Empress Hyo Hyun. Empress Fu Cha was deeply affectionate, humble and simple, and won the appreciation of the imperial court. The two are soul mates and very loving. However, Emperor Qianlong once took a fancy to a lady at a banquet. When the lady was drunk and resting in another palace, Emperor Qianlong secretly followed her and prepared to attack her, but was stopped by Queen Fu Cha. Fu Cha felt that as an emperor, Emperor Qianlong should not do such furtive things, so the queen was a little uneasy about him. Her own child died again. Fu Cha went to Lacrimosa every day. He was in high spirits and exhausted. He died traveling with Ganlong. In memory of Empress Fucha, Qianlong wrote a new poem "Ode to Sadness" for her.

Later, under the resolution of the Empress Dowager, the first princess, Ulanala, was canonized as the successor queen of the Pure Emperor. Ganlong doesn't like Nala very much. Thirty years after Qianlong, he toured Hangzhou in the south. Encouraged by Xiao Shenyang, Gan Long and He Kun put on casual clothes and boarded a big ship together. There are famous prostitutes in the south of the Yangtze River on board, singing and dancing, drinking and laughing. Nora was very dissatisfied when she learned about it. She feels that as a queen, Qianlong is lukewarm to her, and there is a feeling that the queen in Qianlong's eyes is not as good as some famous prostitutes. Then he made a hullabaloo about. In a rage, Qianlong put the queen in limbo and directly abolished Queen Nana. Nana died of depression the following year.

The most ruthless royal family, Emperor Qianlong, had no real love for the two queens. Once he makes himself unhappy, he wants to throw away the waste and forget the feelings between them completely. It can be seen that it is not unreasonable for Qianlong to push the prosperity of Kanggan in Qing Dynasty to the peak, and he personally dragged it to decline.