Board Thread:Questions and Answers/@comment-24.21.198.142-20130908225932/@comment-75.191.168.87-20140529142606
From Katawa Shoujo Wiki
I'm pretty sure you got the wrong ending if you thought that the ending wasn't fulfilling. I won't say anything that happens, in case you are confused, but go into the game's extras and go through her library, make sure you have every chapter unlocked, If you do, you're fine, and I won't judge you on your opinion. If you don't, go back into her story and try again, fleshing out the chapters you missed with your decisions.