he gets exiled for being untalented, but what does the king have in comparison? sure, he is the king, he was BORN to inherit the crown. How does he compare to a swordsaint and a sage? shouldn't the sisters just detrone him and bring back their brother?
also it's pretty lame for the protagonist to spare not a single thought for his sisters, his only supporters (other than Reyfelt) who love him so much but were sent away so they wouldn't be able to stop the exile. the last speech is the classic "mc narrator looking back on how his journey started"