I just finished FFX and FFX-2, and I was extremely disappointed by both endings. I didn't get 100% in X-2, but I did youtube the real endings. and I was still unsatisfied. I found that both left many things unanswered, and if I didn't research the games on other sites, I wouldn't have understood everything. Nonetheless, they were great games and I recommend them to anyone. What great games have disappointed you, be it a bad ending, easy final boss, etc.?