The End, the Telos, Is That of Perfection

Kant is very conscious of setting up the idea that the end, the telos, is that of perfection rather than of a more conventional understanding of the telos of Udaimini or what we would call happiness. The big difference that you point to is that happiness, if one understands it in a particular way, is a state that can be achieved and exist in. Whereas perfection, what makes it perfection, is that it is a process, an unending process.