Academy convention is to award older, more accomplished actors for previous work that was not awarded. Chalemet's age compared to Paul's is irrelevant. IRL, Chalemet is too young (compared to his competition in 2022) to be awarded an Oscar. Not technically, but in practice, Oscars are more like lifetime achievement awards. For example, Jamie Lee Curtis did not give an Oscar winning performance in Everything Everywhere All at Once, but they had to give it to her for her lifetime achievement and the fact that they awarded Oscars to two other actors in the film. That movie was terrible, but Michelle Yeoh deserves an Oscar for lifetime achievement. Ke Huy Kuan, 51, was certainly adequate, but the roll was nothing special. Hong Chau, 41, should have gotten his Oscar for her work in The Whale, which was a notably amazing performance. Kuan got it because of his age, even if his lifetime achievement is limited. Someone decided Everything Everywhere would sweep the Oscars, and it had everything to do with Michelle Yeoh's and Jamie Lee Curtis' lifetime achievements. The Whale was a far better film with more difficult acting that was nailed. It was just too controversial. Frasier got the Oscar even though his supporting actor Chau out-acted him, and pretty much everyone in all other movies. Her performance there was one of the best I have ever seen, and I had never heard of her. She'll be back.
I tried to watch it three times and failed. I don't have a problem with audiences liking it. But awarding it the Oscar for Best Picture was tragic for The Whale. At least it is SciFi, but Star Wars or E.T. it was not.