I mean, my go-to way is to remember that if I don’t control my emotional responses, everyone will judge me and like me even less than they already do. Then I practiced for 30 years.

Honestly, I would question the necessity of the telling-off. Like, whatever it is, you can just let it go and move on with your life. Cut them out of your social circles. Put your telling-off into a text or email. Or cut it down to a short sentence you can toss at them offhandedly. If you’re planning some long elaborate speech… I would strongly suggest you reconsider.