Mr. Harley: Your impatience is quite understandable.
Klaatu: I’m impatient with stupidity. My people have learned to live without it.
Mr. Harley: I’m afraid my people haven’t. I’m very sorry… I wish it were otherwise.

— The Day The Earth Stood Still

If you don’t find a way to work around stupid, you’re not going to get very far.  And remember, there’s a difference between ignorant and stupid.  Ignorant means that someone has not learned about something or is incapable of learning.  Stupid is a willful state of mind.  Stupid means that they either know better and still choose to be stupid. Stupid refuses to learn from others or even from their own mistakes.

Someone who doesn’t know how to balance a checkbook at 19 is probably ignorant.  Someone who can’t do it by the time they turn 30 is stupid.  Someone who muzzles themselves on their first range trip is ignorant, and requires gentle reminding and training.  Someone who muzzles others after years in the shooting sports and argues with those who seek to correct them is stupid, and needs to be stopped before they hurt someone.

Stupid should be anticipated and factored into plans.  Stupid can be countered and walled off, but it can never be eliminated.  The sooner you realize this and live accordingly, the easier, and less stressful, life will be.