I've been feeling like I want to ditch coffee and possibly caffeine altogether for a long time. I often run low on sleep due to my schedule, and I use coffee as a crutch to kickstart myself in the morning, and obviously the healthier thing to do is just get more rest.
That's still not possible yet, but hopefully my daily routine gets less extreme in the next few months and I can experiment with it abstaining. I once gave up salt for a week, and my foods were really hard to eat, especially the Indian food I mostly make. Funny though, on the 4th day the food began to taste normal-ish again.
I really hope you can get to a point where more rest is possible. It will surely take a lot of effort to get there, but once you do… quitting coffee is easy.
Our taste buds have been altered so much, it takes awhile to get back to enjoying plain foods. Even then, it’s hard to forget the memory of how good this or that tasted in the past.