"Avengers 4" Hulk is so smart, he snapped to revive the heroes, why did he say that he was basically abolished?

Marvel fans must know Hulk, Hulk, as one of the battle heroes, can be said to be the strongest combat power. From the first season to the fourth season, Hulk got smarter and smarter. But the audience said that Hulk is becoming more and more useless. Why is this?

In the first part of "The Avengers", Hulk became the combat force in the Avengers. He is also very troublesome. Because as soon as he appeared, he would be completely uncontrolled and wreaked havoc. Because of his fighting power, his destructive power is very large and no one can stop him. Although Dr. Banner has been trying his best to control his emotions, hoping to avoid his appearance. But he will still show up when Banner can't control his emotions.

​​But in "Reunion 2", it began to have a weakness, that is, the widow sister. Facing a widow sister, Hulk is irritable like a kid who has done wrong. After discovering this, the leadership of the Avengers began to use the widow sister to control the Hulk, and the facts proved to be effective.

And in "Thor Three", Hulk's personality seems to be further clear. Here he behaves smarter and seems to have his own ideas. After he was mad, he was very guilty in the face of Thor. And he can communicate with Thor like a friend. It seems that he has regarded Thor as his friend.

In the later "Avengers IV", Hulk is completely different from the beginning. His Dr. Banner's personality has been able to completely master Hulk. However, Hulk's combat effectiveness at this time has been much worse than before. This is not without reason. It has been explained before that the Hulk’s power comes from anger, so the more angry he is, the stronger his fighting power. But as he became more and more rational, his natural strength weakened. Do you think there are any other reasons?