"Too many cooks spoil the broth". This means When there are too many people trying to lead and give their opinions, it’s confusing and leads to bad results. Jobs and projects should have one or two strong leaders.
1 )
Too many leaders are necessary for projects.
2 )
Jobs and projects can be led by too many people.
3 )
One or two leaders destroy the projects and lead them to bad results.
When many people try to lead jobs or projects, they'll end in failure.