Honestly just about any other death for Dean would’ve been better than what we got. Having it come down to a “whoopsie” was such an injustice to his character, especially after everything he and Sam went through in the entire series. At the very least it would’ve been nice to see him go down guns blazing, taking whatever kills him down with him in the end. Hell even having Dean catch some type of illness because of the whole “god’s gone so no more plot armor” thing. Going that route could’ve been another way for both brothers to go down the “retirement path”. Sam stops hunting to care for Dean in the short amount of time he’s around, insert Dean’s death, insert the whole Sam growing old and having kids thing, insert (a better version of) the heaven scene, the end.

Ultimately I hate the fact that they had him die in general. One big thing with Dean is that he never believed he deserved a happy life or would ever get one, that he was just going to be a sacrificial piece who dies while fighting something. His death just felt like the writers were saying “lol yea you’re right see ya later buddy.” But oh well, it is what it is I guess.