Well DoS is extremely easy compared to the original version. And that boss was from FFV where he basically was impossible in that game. And there is more than one boss at the end of that dungeon. Not only that but the boss wasn't hard, and the optional dungeon for after killing Tiamat is even longer... not sure you were complaining about the dungeon being too long or not.

I enjoyed FFI, especially back when I was little and played with my family.

THE JACKEL