be all things to all people
US /bi ɔl θɪŋz tu ɔl ˈpiːpl/
UK /bi ɔl θɪŋz tu ɔl ˈpiːpl/

1.
to try to please everyone, often resulting in not pleasing anyone well
:
•
A good leader cannot be all things to all people; they must make tough decisions.
•
In trying to be all things to all people, the new policy ended up satisfying no one.