@Barneyhill, Good for you!!!! I lost a friend of 30 years in 2018 because she was so upset that I wear lipstick and exercise and keep in shape that she felt it "her duty" to tell me that the other women in her group didn't like me because they perceived me as a threat. WUT? A threat to what? I didn't know any of them, so I'm not sure how I could possibly have threatened any of them for any reason (we haven't lived in the same place for the past many years). Long story short, she got very angry because I wouldn't "dress down" and "stop wearing makeup." My conclusion is this: real women friends do not demand that one another give up parts of themselves that are important (such as looking nice and staying in shape).
Now, as to younger women making remarks, that is simply ridiculous as we all age and aging does NOT take away our desire and need to feel attractive to other people. I have never had a negative experience with a young woman regarding my looks. I've been very blessed, I suppose, in that they are mostly just very complimentary.
Now, as to the fellow who made the disparaging remarks, I would have smiled and said: well now, you seem to think I care what you think. I don't. I dress and groom myself to please me, not you.
People who try to shame others into changing some behavior are merely bullies. If they have a legitimate complaint, then state it and stop with the shaming. For example, if my lipstick is smeared or on my teeth, or if someone asks whether I like one look more than another, I will be honest. However, unsolicited "advice" on a person's looks is not welcome. If I can give a compliment, I will. If I can't, there is no reason to be mean.
Ha, ha to the comment about younger guys. I'm sorry, but so what if a younger guy finds us attractive??? I don't know a man alive who doesn't find younger women attractive - turnabout's fair play, eh? We all need a bit of admiration from time to time to make sure we still have a pulse
I would hope that any of us at any age could acknowledge that beauty is in the eye of the beholder and is ageless. I've known beautiful people of 20 and beautiful people of 90. Geeesh, one age range does NOT have any human attribute locked up as their own (and I taught and still teach the sociology of aging, so I'm basing that statement on findings, not feelings).
P.S. I wear bright orange lipstick every single day because it brings out my blue eyes (but mostly because I LOVE it

You go girl. . .wear the lipstick. . .claim your identity . . .and smile. As I tell my daughter: illegitimi non carborundum