Yes. This is so true.
The end is never the end is never the end is never the end...
I would even say that it gets more complex or more exhausting over time. Maintaining a relationship or a job not only requires to train the things I already learned, you actually have to keep learning new things too. And also your body ages, if you want a stable body and mind later on, you need to add more and more healthy practices.
When I was still young(er) and more hopeful, I was convinced that achieving something will make life easier. Completing a goal and keep the reward. School system and products were advertising it like this. Get this degree, buy this thing, live in this house and your life will get easier.
But now I know that this is not the case. It will just get harder and almost nothing will help my present or future self.