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Walt's death in the lab was appropriate. He died on his own terms, not nature's, and not begging and bargaining (like Jack). But it wasn't something transcendent. Almost with acceptance of his fate and guilt he asked Jesse to end it for him. But Jesse was having none of that.

As an example, Gus's death was fitting for the character.

And Breaking Bad knows how to do this. Mike's death was one of the best ever in TV or film. Mike, sitting on the riverbank bank bleeding to death . with a beautiful golden sunset to bring him to his end but true to Mike's character, it's "Walt, shut the f*ck up and let me die in peace."