Readers will have to believe that my tongue is, at least partly, in my cheek for this.
The OP, like most of the world and I certainly include myself in this, is a junkie.
Coffee, all coffee, however ‘good’ or ‘bad’ tastes shit, or bitter at best. You can mask it as much as you like with fat (cream or milk) or sugar (sugar, sugar or one of the dozens of ‘flavours’) but coffee tastes shit.
Like other recreational drugs, if it didn’t do, what it does, you’d give up after your first dose.
I suspect the best decaf coffee is the one with the most caffeine left in it.