too much of a good thing
idiomPart ofthing
too much of a good thing — idiom
1. Used to say that even pleasant things can become unpleasant if you have too much
1.idiom
Definition
Used to say that even pleasant things can become unpleasant if you have too much.
Example
I love chocolate, but too much of a good thing can make you sick.
Even holidays can be too much of a good thing if they're too long.