Girl vs Girl

I have often wondered why ladies are always so bitchy to each other. I still don't have an answer yet, I mean whatever happened to sisterhood? all that girls guide thingy? was it not supposed to be bonding of some sort? You walk on the street and ask directions from a fellow lady, she'll either give you the hand(I've always thought it's to show off a recent manicure trip or acquisition of new claws-how do they work with those excessively long nails that don't even allow you to close your hands when you're not Nicki Minaj-)or tell you in a very condescending manner to ask someone else. In very rare instances they give help. Why?  Sometimes I think this innate  competitive streak is taken to the extreme even if the person is not a direct threat in her hemisphere, a woman sees another lady and just concludes 'competition', no matter the age or social standing. Sometimes the need to have an edge is played out in the subconscious like in the picking of friends that you know you are more beautiful or attractive than, they act as contrasts to your own high points and you only get to find out about this when people keep telling you you're hotter than your friends and then the internal war arises- should i move onto more beautiful people like me? after all  beauty is attributed with class (although I've seen very poor exquisitely beautiful people) or should I stay with my friends and continue to be the reigning queen? How about when married ladies see every young girl as a threat? my neighbour then did not want me to greet her husband, the husband on his part made it a duty to undress me with his eyes every time he saw me, in retrospect, I wonder what he saw, I mean it's not as if I was well endowed per se, I had only nipples(that was the period i used to make my "oh Lord please give me big breasts" prayer. The man will smile stupidly and look for inane things to talk about, I used to think he was quite silly and wondered why the wife was always so nervous, it's not as if i wanted to take her silly ugly husband who did not look anything like the sheiks and prince charmings I'd been reading about in my 'Ghana must go' full of romance novels. Her nervousness and reaction was quite irritating and stupid to me though. If anything, shouldn't she have been trying to protect me from her lascivious husband? How about the cases of the abused little girl who reports dad/brother/uncle to aunty and aunty gives her the beating of her life and chooses to take uncle's side rather than the victim's? where is the sisterhood? Should I venture into the mother-in law/sister- in law treatment of the wife even though it is an all female cast?