It means that too many opinions/ideas as to how something can be done will not have a good outcome. An example would be in making a soup and having everyone add what they like. It would not work out right and no one would eat it.
"MY mother always used to say"
"Too many cooks spoil the broth."
yes
too many cooks destroy my soup.
It means: Too many cooks spoil the broth. just expressed with larger words.
It has been around a very long time as a proverb. It means that if too many people add to something the changes will not work well.
Too many cooks do spoil the broth means that when too many people are involved in a given idea their contrasting views may make the project fail.
Too many cooks spoil the broth. I just love the aromas in the house when my aunt cooks Italian food.
Too many cooks spoil the broth.
Too many cooks spoil the broth (like a soup).
Too many cooks spoil the broth.
The records of when and where the quote 'too many cooks spoil the broth' have been lost to time. However looking at the origin of the word 'broth' it seems to have been used at least since the 12th century in England. It's possible the quote was a wise person's musings which spread and became popular with the original creator never being given credit.