Bittersweet endings are by far my favorite, but this was so poorly executed that didn't had an effect on me at all. I just didn't care that much.
Deb dying was a bit unnecessary, especially with Dex surviving the ending. He should have died in order to make even a small impact.
The other parts were absolutely dogshit, from Dex killing Saxon in front of camera and then not having any trouble, to Hannah doing what she did in the bus and to Dex 'killing' and getting Deb outside of hospital. I thought that the writers were just random idiots but now I think that they entirely lack the brain.
Anyway, I hope that I remembemer the first half of the TV show, which was one of the best TV shows I have ever seen. The second part is by far the worst US TV show I have watched for more than a few episodes. Shame!
I think that it will continue in some form, be it a Season 9 after some years or a spin off. I think that is the reason why Dex became a lumberjack instead of a food for fish.