Well IMHO that's the MAJOR problem of this game.
I've been playing FFs since ages and i fell in love with the stories depth. Well written plots in the plots and shocking moments were its power and fuel.
In FF VII or X (for example) you used to be HAPPY when you reached a new city/location with the long-fighting phases which tended to be boring.
Do not expect this to be the same kind of experience or it'll hit you like a mack truck full of disappointment, you'll be doing fetch quests even later on (actually all the quests up to now have been like this to me).
Worst thing is you can't even "skip" the questline since it unlocks most game content.
ATM i'm LvL 48 PAL but still stuck in 38 lvl main quests (while unlocked/completed higher lvl 47 dungeons which are better).
Unfortunately there's just a TON of BORING/WORTHLESS quests while i still need to find a cool one (i'm not counting dungeons/trials as part of the quest here since the quest is just an excuse to lock the content behind something in my opinion and not a part of it).
If you cant be bothered with it anymore you can buy these
Tales Of Adventure
from the mog station.
While dungeons so far have been indeed boring for you (due to being too easy) that is going to change around lvl 35+ dungeons. This is a nice thing so that ppl take confidence with the system before engaging more serious business (around lvl 40 there are mechanics in which one person messing up could easily translates in group-wipes).
Also remember that there are many things you probably dont know that you should do (what targets to hit, NOT to pull, if/when to swap a target not to draw enmity). You are probably not doing them yet but i encourage you starting looking into em or you'll be in trouble later on.
Doing DPS WHILE switching targets and paying attention to these things gets harder hence more satisfing