I don't think it's dying, there's a lot to do but I understand your frustration with everything. The game is actually pretty fun. Still, I think with these Relics there was never a point where if you got it, you could do something with it. Instead of just more damage. I think it relates to the stats not being so in depth, and there not being a lot of customization and horizontal progression. Instead you feel like if you work hard, by the time you're done there's another step or something else easier to obtain that does about the same thing so why bother?
So right now if you got your relic and stood beside someone near or at the same ilv as you, you couldn't eyeball a difference you would have to get down to the numbers. In 11, if you worked for a relic you were bad bad mofo. You deserve it too if you worked that hard.
I wouldn't compare so much to 11 in terms of fights. It was fun, but it was the gear and the enhancements that made me go "My play style will change with this." but otherwise you're setting up the MB and throwing as many spinning dives as you can at something. Then again I stopped a bit after Abyssea. Someone dies, tractor them and then kneel to heal for MP..go look at old Sky fights. The quests weren't that great either "The guy went somewhere up to the north." ...what's north? Death. Come back "Good job buddy listen I don't have a lot of cash but..here's..300G. Sound good?"
If you try to do everything you are going to go insane with anger, if you don't take a breaks same deal. There's been times I've said "I'm going to craft this!" then look at it..to craft this I need to craft something else..which requires another craft, that requires me to gather something that is only up every hour..just for one ingredient needed out of 4.
Still, I put the game down go hit up real life come back and go "I love my Roe..I don't like the people but I love this game" I always said if I quit it's because of the people and not the game, so far that stands to be true.