I notice that a lot of men expect me to validate them in some way or they take general politeness as some kind of come on. A huge amount of men seem to have issues of some kind with gambling, porn use, substance abuse, debt and poor emotional regulation getting angry, sulking or violent outbursts.
Even many "nice" men have these issues. My two closest friends one is a consultant doctor, married to a software designer who regularly drinks so much he pisses the bed and they need to use rubber sheets, the other is a university professor married to a solicitor who has essentially gambled their life savings away on the stock market to the point where they can't afford to buy a home in their early 50's.
It isn't all men but their are very few good reliable men to go around for all the good women I know.
Another comment suggests that women maintaining their appearance are doing so for men but that is simply not the case for me anyway. I do look after myself, I eat well, exercise, do Pilates and yoga, I look after my skin and hair but I do so for myself to maintain my own health and wellbeing and for good health as I age. If that makes me more attractive to men and more of a target of their interest then that is a regrettable side effect and not my aim.
I am married to a man I consider decent, I wouldn't be with him otherwise.