I'm not quitting yet but I'm on the brink of stopping, so here goes.

[Reason why you're stopping/quitting FFXIV]
Not enough quests/lore
Not enough solo/duo content
Crafting is boring
1.20 made melee fighting boring. Combined with the above, there's not much left to do that'd be engaging.
Paying for the game is complicated


[Parts you enjoyed about FFXIV]
I much enjoy the lore that is already in the game, the sidequests and class quests as well as what there is of the main quests
Concentration on PvE instead of PvP. I hate PvP
The graphics are quite good to look at

[Parts you were disappointed with FFXIV]
Lack of quests and solo/duo content
The absolute chore that they've made out of player interaction (item trading/delivery, buying items, materia melding if you don't have a high enough crafting class yourself, LS management, able to see but not talk in multiple LSs)
These two are what most disappointed me, see above for other grievances


[Last comment]
While pre-1.20 I've been quite content to sit and wait and play when I could, currently there's not much left for me to do I'd consider fun, especially as I've already done most the quests. If the game didn't have Final Fantasy in the title, I'd be long gone already.