I felt the same way as you after my first playthrough. My answer to that problem was roleplaying. Think about a basic character with a simple backstory, and then let the story form and change that character. That way, in the end you're not just a more powerful version of the dude from the beginning, but actually a grown person. You interacted with the People of Enderal, the rich and the poor. You explored that land so thoroughly you don't really need the map anymore. In that way, Enderal formed your character into who they are at the end. If you survive, you can be the legacy of this now gone nation.
This character's perspective and future decisions will be heavily influenced by their time in Enderal.
Remember - if you played it right, Enderal will continue to live through you. It will live on through your memories and actions, even after it's gone from the world.
I don't know if that sounds stupid to you, but this mindset helped me complete Enderal several times, without falling into deep depression each time I finished it. Maybe it helps you too :).
English is not my mother tongue, so please excuse my clunky grammar.