The fact that Jonah Magnus died in such a painful, personal, human way is viciously satisfying.
He doesn’t get a supernatural death. Doesn’t magically implode or whatever. No, he’s stabbed, over and over with such hatred and anger from the man he manipulated for years. He feels pain for every one of those he used and did nothing as he watched them die.
He died so very human, and that is exactly how it should be.