Question

The grass always looks greener when it's fake meaning

Answer 1

The saying goes like this  - the grass always looks greener on the other side.
meaning- one always thinks that the other person has an advantage or had better circumastances

Answer 2

The grass is always greener on the other side of the fence:

This is a great prover this tells "we must not compare ourself with others", We must be happy with what we are having. The grass is greener on both the sides of the fence. We must not compare about those and maintain our own business/work.

This proverb was by the poetry Publius ovidius naso. Example for the proverb is - If there are 7 greatest people in the world we must not compare between them, we must just try to better than others without comparing others.

We must mind our own business/work. We can see how people are and who are they but comparing is considered wrong according to this proverb.