you watched cecil's ending in youtube?, unacceptable!!!
just kidding, i played the ds version and grinded my ass off on levels because it became nintendo hard (the snes version is waaay more forgiving, you can finish the game at 50'ish and you get that level just by playing, no need for 99 like in ff8), then i battled zeromus for a bit, kinda disappointed at how easy he became with best equipment, good thing i could still trow excalipoor in his face for 9999 damage tough (i did finish the snes version first, but i wanted to see ending with cgi), i didn't wanted the battle to last longer than necessary
lol, i undestand the toughness on IV, i played/beat all the versions of IV, and i can assure you, the easiest one is the PSP Complete Collection one, you dont need to grind that much in order to win, the GBA one... brr still remember having trouble AT THE FIRST DUNGEON!!!
Similar issue with XII and the fucking hunts, jeeeesus. I actually left it for an entire year not completed because of them, then I got FF13 and decided "FUCK THIS I WILL BARREL THROUGH AND COMPLETE IT BEFORE STARTING ANOTHER SO HELP ME GOD."
And I did in about an hour, and it wasn't as satisfying as I thought, since the game felt mmfffffleh towards the end.