Do you ever regret not telling off certain people who deserved to hear the criticism?

Like maybe an old boss, an ex, or a family member or in-law. I’ve often taken the high road and to be honest sometimes I regret it.

Because if I could go back today I think I would have told my old boss to kiss my ass many times, and I’d have another one suffer the consequences of his sexual harassment, and I’d have knocked a couple of family members off their soap box too. I don't know maybe that’s petty but some people get away with too much bs.
Do you ever regret not telling off certain people who deserved to hear the criticism?
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