I have a problem with this oft given advice.
By all means exit a relationship that has run its course .
But not in the belief there is a string of fabulous replacements out there.
Be single !
To advise people to leave so to “find someone who appreciates you “ or “you are worth more “ seems misguided.
I have several divorced friends who simply never meet eligible single potential partners. One of them definitely got divorced in order to meet someone better. That was 15 years ago. All her relationships since then have been affairs with married men.