Ohh yeah I skipped that first Juggernaut too. Or at least I tried it, and failed miserably, and decided to move on. I never did go back - something for the replay or post-game stuff.
The other annoying one which were unfortunately usually difficult/impossible to avoid, were those things that looked like aquatic chocobos. Dragonite, or something. They peck at you, HARD, about 10 times in a row - really annoying, especially when there are a few of them.