All those things that you describe are true for anyone, Siebe.
That is part of the suffering that people tend to ignore. Life is a struggle, and we normally do not feel most of the suffering because our minds are focused on perceived benefits in the future.
But by the time one works hard and get to the top of their profession (if one is lucky), one is at the old age and is getting close to death.
It may sound too blunt, but that is the reality. Think about all those who reached their peak 10-20 years ago, and how they are doing now (if they are still alive).