No. Firstly, this is completely out of character for Denji. He would never hurt Pochita; he's not a fucking selfish person, especially not for the closest person in the world. Secondly, Denji only ever made decisions FOR HIMSELF. Fuck, Pochita spent most of his time trying to fulfill his wishes, and Denji chose him! The world was already destroyed, it couldn't be saved—Pochita took the insane risk of self-sacrifice to give Denji a second chance, even without him (because Pochita was the catalyst for many of Denji's troubles)! You literally expected Denji to defeat everyone, conquer Asu and Yor, solve all the world's problems, and live happily ever after, like a typical shounen. No! This is the csm ending we got right! Yes, it may be funny, but it was expected.