"Kuiba", a sentient and righteous demon, how can it be eliminated again and again?

Quiba, the demon king born every 333 years, has the power to deter even the protoss. Batou, the chief of all previous dynasties, was attacked by people and gods. After watching three Quidditch movies, I have a question: Is Quidditch really that heinous? In Que-Ba I is in a hurry, the fourth generation Que-Ba sacrifices himself to protect his subordinates, and finally moves them to a safe place (whirlpool island) and waits for his resurrection. In this respect, it can be seen that Quiba is also a "wise king" with flesh and blood, and attaches importance to the leadership of subordinates.

In Kuiba Ⅱ, I learned that the Ghost Crazy was originally a member of the Coalition against Kuiba, but later he was indignant because his comrades' exploits were not recognized (no honor was not recognized), and then he broke into Kuiba tent camp to kill Kuiba (of course, he couldn't). For such a man who wants to kill himself, Quiba didn't kill him, but helped him "revenge" and then let him stay with his "sworn enemy". When you are not surprised, the dimension is useful, and the charisma of the outstanding personality is vividly displayed.

In Kuiba III, in order not to destroy the beauty of the sea of a thousand divisions, the Kuiba fleet pursued by powerful enemies turned to fight instead of moving on. Hai Wenxiang was moved by Quiba's actions, so he decided to become a soldier of Quiba and defend the route to Vortex Island to the death. I don't know much about other plots because I haven't seen other related animation works except movies. But judging from these three films, Quetta can really be called great, and such a strong personality charm is really unbelievable. Is he really that terrible and hateful?

The sixth generation Quebap, that is, Mangi, is the Quebap we are most familiar with. Because of his amnesia, he followed Man Xiaoman on the road to crusade against himself, but will such a simple, kind, honest and brave child eventually become "horrible"? If so, it is hard to imagine what kind of scene it will be. So I still believe it will be a happy ending. Although only the fourth film can be shown, the ending is not perfect, but I am still looking forward to it.