Like the protagonist, I myself am an introvert and lover of mythology, folklore, and fairytales. I think this tale does capture the mystery, romance and quixotic mood of many myths. I think other viewers were a little let down by the ending, but I guess I wasn't too disappointed. It's impossible to have a clever ending that satisfies all the audience in any 3 wishes tale. There's no pitfalls someone has not explored in this trope. Given that understanding, I think you can still revel in the gorgeous feast for the eyes this is... and take this for what it is: an immortal tale with a somewhat mortal ending.