Are people bad at their jobs or are the jobs just bad?

I recently retired after 45 years in tech. I started out in 1978 at Bell Labs. I have had great jobs and terrible jobs. Great bosses and horrific bosses. And all the things in between. I did not just survive, I thrived and beyond and worked at 3 start ups and a bunch of other companies large and small. What I learned is to not to be afraid. Regardless of what is happening around you. Fear is the enemy. Don't be afraid to be weird or crazy or whatever is causing you to be timid.

Fear is the mind killer.

Fear is one thing but how do you deal with regret? Regret for taking the leap as well as regret for not taking the leap? There can be regret in both paths.