Sure it's frustrating, but It's the only possible outcome. This isn't a story about redemption, it's a story about our current age. Dory is a perfectly despicable character. One of the most sincerely awful, egomaniacal, delusional characters I've ever seen on screen. And a perfect representation of the average person. To the reviewers talking about how they didn't like the show... how did you watch 5 seasons and not get the point? Lmao.
The world stays the same, only in slightly worse iterations of itself every day. Of course this was bound to happen. The ouroboros eats its tale again.