Too Many Cooks Spoil the Broth
(too many people trying to take care of something can ruin it)
What are you doing, Benito?
I'm trying to fix the copy machine. I'll have it going again soon if everybody stops making suggestions.
Well, you can't blame the other employees for being impatient to run off their materials. They just want to help you.
Yeah, but too many cooks spoil the broth. They really don't know what they're doing, and if I listened to their advice this would never get fixed. I'm the guy with the experience, and I don't want to have the machine ruined by too many people trying to fix it. Just let me be, and I'll handle it on my own.