I agree that you should not wish harm on them, but don't downplay how bad heartbreak can be. It affects both your physical and mental health, and I'm certain the latter of which can last a long time, not so sure if the physical health gets affected as permanently or not. Anyway, mental health damage alone can have terrible effects on your life.

Also, the other things you mentioned are bad too, but those usually happen in addition to heartbreak, so it's easy to think that those are worse but heartbreak aside they have their own level of terribleness.