My two cents: being happy most of the time in your career is an impossible goal.

Everyone struggles. Sometimes they are miserable, bored, frustrated, burned out, overwhelmed, confused, tired, etc. no matter what career you choose, how lucky or skilled you are.

This is not to say that attempts to improve are futile, but it’s better to dispel the illusion that career heaven exists, so we have a sober and liberating experience when dealing with its challenges.