I understand how you feel, if I ran into one of my ex-boyfriends, I would want them to think... "Wow... She got hotter." Haha, of course I really do not care what they think, but I am not going to lie, encounters like that amuse me.
For people close to me, I always want to look my best, so I do get hurt if they criticize something about my clothes, hair, or general appearance. For an INFP, I put a lot of effort into how I look, and it hurts when it goes unappreciated, or worse, gets criticized. I am not sure I get ticked off, I just get hurt. But sometimes it is good to have someone tell you you look kind of funny with that eyeliner on, or that sweater makes you look dumpy, but only if they are close to you. Random strangers or ex-boyfriends have no right to be saying negative things about other people's appearances.