Not all girls feel that way, a lot of women are looking for a gentlemen. :) Unfortunately, the girls your talking about are either not mature enough and ready enough for a gentlemen, or are users, players, or always searching for the next best & exciting thing, instead of appreciating what they have & not taking it for granted.
I don't get why gentlemen are so looked down upon... I honestly think it's super sweet and a kind gesture when guys do things like grab the door for you, or even pulls the chair out for you to sit down.
Society has really gone down hill if that's a turn off, but I think some girls do have an issue with that and see it as being a kiss *ss or a guy being desperate when that's not even the case at all. Some guys were just raised with class and morals that they stick to.
However I think it just really depends on the girl.