Too many cooks spoil the broth.(或 soup) 照字面意思就是：太多的厨师,反而把汤破坏了.也就是说,如果人太多,意见也多,反而不易做出决定.其实一个人作主就够了.(the more people work on a project,the worse it may turn out; or too many people or ideas may prevent from getting things done.) 所以可以说：
I need to solve this problem myself; sometimes too many cooks spoil the broth.(我要自己解决这个问题,有时人多,意见多,反而无法决定.)