Yeah, FFX was a big letdown for me. I actually started playing RPGs (and video games), during college because of it. I'd been watching my friend play FFX when it first came out... I'd watched him play FF8 and FF9 as well, but I hadn't been in a place in my life where I could really play games. Seeing FFX was the last straw though. I downloaded FF6, loved it, then got FF8 for the PC (loved it even more), FF7, and then went on from there. It wasn't until almost two years later, though, that I actually bought a PS2 and played FFX... and I was quite dissapointed with what I finally saw. Before that, I had been playing the previous games because they were the only ones I could play on the equipment I had. It taught me a good lesson about how newer, and better hardware didn't always make the better game.
Don't get me wrong, in the grand scheme of things, FFX is a fine game... I just had higher hopes for it than what it delivered. I was expecting it to be one of the best in a series of incredible games, when it was only a "good game", I was pretty put off.
i realize this thread is about story but that doesnt change the fact that FFX is easily the best game in the main series on the merits of the battle system alone. but im gonna stop at that because this is probally a discussion best left for another thread.