There could be several reasons why older women may give you dirty looks or not respond positively to your friendly gestures:
Misinterpretation: Sometimes, people can misinterpret others' intentions or actions, leading to misunderstandings. Perhaps they perceive your smile or manners in a different way than you intend them.
Cultural or generational differences: Different cultures and generations may have varying norms and expectations regarding social interactions. What is considered polite or friendly in one culture may be seen differently in another.
Personal issues or moods: Sometimes, individuals may be dealing with personal issues or have bad moods that influence their reactions to others, regardless of the other person's actions.
Prejudice or bias: Unfortunately, ageism, like any other form of prejudice, can exist in society. It's possible that some older women might have negative preconceptions or stereotypes about younger people, including younger women.
Body language or demeanor: While you may feel that you are being polite and friendly, subtle body language or other cues could be perceived differently by others.
Past experiences: It's also possible that some older women have had negative experiences in the past, which might influence their reactions to strangers, regardless of your intentions.
Regardless of the reasons, it's essential not to take it personally and continue being polite and kind to others. You cannot control how others perceive you, but you can control your behavior and how you treat others. Don't let the reactions of a few individuals affect your kindness and positivity towards others. Keep being respectful and courteous, and most people will appreciate your genuine gestures.