Today’s cliche is “The grass is always greener on the other side of the fence”.
I don’t like this one, although there may be some sense in it. I think it’s a way for people to subtly quieten your dreams and stop you complaining when things are not right.
“Oh, things always seem better, but they aren’t, really, it’s just you” is what this particular cliche reads between the lines.
BUT, the grass often IS greener on the other side. And isn’t it up to us to decide what we want and what is right for us?