Have u done all the guildhests up to your level? Those are pretty fun and give tons of xp first time you clear them. I do agree with you that farming fates can be kinda boring. Def join a party if u are gonna fate grind for a bit. Also yea, Duty Finder kinda sucks post Brayflox Longstop as it seems to me that the dungeons get a pretty significant bump in difficulty from then on. I joined a great FC on my server and have been loving the availability of players on my server that i know can handle the dungeons im running. They are basically helping me get to 50 quick so i can heal for them
Guess what im saying is there are a few others things u can try besides fate grinding before you give up on the game, but if thats just how u feel then no one can change ur mind. If its not the game for you then it just isn't and im sure u can find something out there that suits u better.

EDIT: Also dont neglect your hunters log. That thing is beast for xp.