With respect for what is obviously a sincerely held view, I think you are missing the point. Men, regardless of their age or appearance are attracted to beautiful women of child-bearing age: this is how nature made us, to facilitate reproduction. Women on the other hand are attracted to men of high authority or status, so either wealthy, successful or both. In earlier generations this was necessary to ensure the prospective father of her children could support her and her children; again, a successful breeding strategy. Society has changed, but our biological drives have not.
So in a perfect world older men would not hit on you, but they are only doing what evolution made them to do. And after spending over an hour doing your make-up to make you attractive, isn’t it hypocritical to complain when you do attract men?
If you persist in believing it is this way “Because patriarchal society had brain-washed women” that will just make you unhappy. If you understand that men and women are programmed by evolutionary forces to use different strategies to find a mate, then you might find it isn’t offensive or patriarchal, or sexist: it is just the way our species is. Human Sexuality doesn’t have to be a battlefield.