Someone you work with, or someone who works for you makes a mistake. The easy thing to do is let it bother you, complain and then decide “I would be better off doing this myself”
While that might be the easy thing to do, it isn’t necessarily the best thing.
How much better would it be to show them what they did wrong and then show them the right way to do things. Short term it might be easier to do things yourself but in the long run, delegation, with proper training and management, will allow you to get a LOT more done.
Have a great day!