I have always had low self-esteem and an extreme fear of failure. That has always fueled an almost panicked urge to try as hard as possible because “even my best is likely not good enough”. I have done well for myself but I also have chronic insomnia, very high hypertension, and needed emergency quad stents installed at the age of 44 (should have been a triple bypass but my surgeon was a hot shot).
In other words, it is probably healthier to channel your inner slacker. “Whatever.”