User blog comment:MiraMajin/Now that FT is about to end.../@comment-3987368-20170529091255

At first, I would have said it was around the GMG arc. An invasion of Dragons in any other manga would mean a series of epic battles, death and destruction that leaves long-term effects on the setting. What happened in Fairy Tail? They all went away thanks to a poorly-explained, illogical plot convenience. There were problems throughout the arc but had this gone well, most of those would be forgivable (barring Sting giving up- that was fucking stupid).

I still think the GMG is the biggest indicator. Going back however, the problems were starting to become apparent in the Nirvana arc. None of the fights barring vs. Racer and vs. Midnight were any good if I think about them, Natsu vs. Zero was downright garbage and I found Wendy's grief and such at the ending to be overly simplified.

Even arcs I used to like, such as the Fighting Festival, I now consider to be decent at very best when they were once among my favorites.

Hell, even the little things between the arcs tend to be complete ass. Allow me to borrow from a friend of mine:

When you do a training arc, do you: a) Show off our characters working really hard, learning to master a new technique, gain personal realizations, and come out stronger for it, or b) Have them party in a time-warped fairyland, robbing them of all the time they had to train, and then solving it by applying a cheap magical deus ex machina powerup?

There's nothing Fairy Tail does that other shounen manga don't do better. If anyone reading this has only just started, do yourself a favor and check out another series.