公元1644年，李自成的起义军攻入北京，当时在宁远的辽东总兵吴三桂接到命令，准备发兵保卫京城。部队行至山海关之时，就接到了崇祯皇帝自缢的消息。此时的吴三桂是真正的应了一句俗语“前有猛虎，后有追兵。”前面是李自成的义军拦路，后面是多尔衮的清军追击，无论面对谁，吴三桂都是无力一战。

于是降或死，这是一个问题，不过还在李自成抬了吴三桂一手，杀了吴三桂全家，夺了爱妾陈圆圆。Wu Three Gate must avenge his family and lover, so he can't die. So he had to surrender to the Qing dynasty. This made him be remembered as a traitor in Chinese history.

But why is Wu Three Gate hated more than other Ming generals who surrendered to the Qing? It's because of how he was portrayed in Chinese literature and drama. He was seen as a villain who betrayed China for love, which is not true. He had many reasons for surrendering, but these were not considered important.

Another reason Wu Three Gate is hated more is that he killed the last Ming emperor, Zhu Youjiao (also known as Yongli), after capturing him from Burma (now Myanmar). This was seen as a brutal act that ended any hope of restoring the Ming dynasty.

Finally, Wu Three Gate's rebellion against the Qing dynasty after being punished by them made him seem like a hypocrite. He claimed to want to drive out the Manchu invaders and restore the Ming dynasty, but this was just an excuse for his rebellion.

So it's not just what Wu Three Gate did that makes him hated more than other Ming generals who surrendered to the Qing; it's also how he has been portrayed in Chinese literature and drama over time.