The only xbox exclusive(s) that I can think of that I have enjoyed and come back to in the past decade are the forza horizon games. I've had more enjoyment from backwards compatibility and 3rd party titles on my Xbox.

Halo should have been good. But something happened to both bungie and 343 during that split. Bungie had some kind of magic with their specific group from halo CE to reach. They knew what they were making, and they knew exactly how to bring their vision to life.

After the split, it felt like both company's were limping their releases to the finish line.

To be fair, I think a good portion of the issues are that Microsoft seems to be treating everything like a financial decision and not a creative one. I know this might not be the most popular opinion, but shit I would be happy if they scaled back their games a bit and just made something solid for once on a cheaper budget. I think we've seen that people don't need these massive projects to have fun. If you look at what some of the most popular games have been the past while, a lot are indie games.

I think the saddest part is that the xbox ecosystem during the xbox 360 was so good when it came to community features. Party chat was a game changer, and it made the system feel like a hub to gather friends. A lot of the games available were perfect for groups. Now because the games have been suffering, a lot of my friends have moved to various platforms. It's become less social and a lot less fun. Of course this is anecdotal and less of a tangible issue for Microsoft. But it's these long term issues that have cause a cascading effect of corroding their brand.