What is Wei Xiaobao's only dissatisfaction with his "buddy" Emperor Kangxi?

This content is not in Jin Yong's novel Duke of Lushan, but my reasonable imagination.

As we all know, Wei Xiaobao, the hero of Luyigong, the son of Wei Chunhua, a prostitute in Yangzhou, strayed into the Qing Palace. False eunuch used to be good friends with Alex Wei, who was about the age of Kangxi in Aisingiorro, even childhood friends, and even married Kangxi's sister. He also helped Kangxi make a lot of contributions, captured Ao Bai and Wutai Mountain to visit Shunzhi, defeated the Russian invaders, wiped out Wu Sangui, and curbed the Heaven and Earth Society ... Many great achievements of Kangxi Dynasty were actually accomplished by this little rascal and Jianghu gangster. It can be said that this Wei Xiaobao is Kangxi's agent and another Kangxi.

Because Wei Xiaobao and Kangxi are good buddies, and Kangxi is indeed a great emperor in history, with brilliant talents and unparalleled martial arts, Wei Xiaobao has always admired Kangxi, and he is basically satisfied and supportive of what he has done. But there is only one thing Kangxi didn't do well. Wei Xiaobao dare not compliment him. Although he is not good at opposing him face to face, he must be criticized when chatting with seven beautiful wives behind his back. What is this?

In other words, Wei Xiaobao personally participated in the leadership and made great contributions to the jaxa war between China and Russia in the Northeast. China was the winner, but when the two sides signed the Treaty of Nebuchadnezzar after the war, China did not need to make concessions. Kangxi still promised to cede hundreds of thousands of square kilometers (perhaps more than these) from the north of Outer Xing 'an Mountains to Lake Baikal to China. How many people should there be in China, with dense forests and clear rivers? So I gave it away for nothing.

Wei Xiaobao, as a street hooligan, never wants to suffer a little loss at ordinary times. It can be said that he won't give an inch of land, because he is penny wise and pound foolish. In the face of Kangxi's victory, he gave the enemy such a large territory in vain, which was too big to describe. How can he understand this "credit transaction" of "land for peace"? How can he not secretly blame his "buddy" Kangxi in private?