One of the easiest ways to make someone mentally unstable is to force them to be perfect all the time.
We often see this kind of situation in a workplace. Probably your boss does the same thing and makes you crazy.
We can’t always be perfect. It doesn’t mean that it’s okay to be careless and do a lousy job; we just need to admit that we can’t make everything perfect all the time, no matter how hard we work.
Focus on getting better, not making things perfect.