If people take care of their health and mindset, they can’t get tired.
Then what is the feeling they get that is called “tiredness”?
It is technically a nudge to change.
Take a different course.
Start believing yourself more.
Change the definition of possibility for you.
Learn from those who have already done what you have done.
Divorce anger, marry calm.
See things from a different perspective to be viewed from a different perspective.