UJM, not only are your completely wrong about opening a door and the like, but you make a chillul hashem in public when you talk with the tone of voice you do about AMerican customs. Anybody, frum or non-frum or not even Jewish can be reading this site. The kindness and customs of the USA are why you are in yeshiva. The Russians and Nazis weren’t so kind. Have a little hakaras hatov.
Please look up the gemara in Yuma 86 hechi domi chilul hashem, and see that when one doesn’t speak bnachas im habriyos, that is the greatest chillul hashem even if he is a great talmid chochiom. Talk with derech eretz about this wonderful country and the outstanding menschalchkeit and kindness that is the norm in the USA.
Second, as far as halacha, you are also totally wrong. The issur of walking behind a woman is because of histaklus. But on a date, histaklus is permitted (within reason), as the shulcham oruch says it is permitted to look over a woman to see if you find her suitable to marry. That is the whole point of a date, so if you are behind her for a minute to walk her to the door and protect her from any intruders, it is totally mutar. Even if it’s not a date, but just giving a ride to a stranger or a friend of your children, you should walk to the door.
Third, as far a chivalry is concerned, whatever happened to the gemara mechabda yoser migufo??? If you don’t like a gemara you cross it out with a big black magic marker?
Fourth, the gemara in kiddushin tells us that a certain amora didn’t want his mother to walk on rocky or hard ground, so he had her walk the whole way on his hands. Why would the kovod to a wife be different?
Fifth, The Meiri in Bava Kamma says that the reason whay many of the halachos of ovdei kochavim don’t apply today is because the other religions have nimusim (manners). There is no shame in learning from the manners of other cultures.
Sixth, what about the gemara in Brachos that certain tannaim said, oheiv ani es hamidayim, and oheiv ani es hkaldiyim (I recall), because they have certain nice practices,
Seventh, what about gemara that says we learn kibuid av vaem from dama ben nesina, an idol worshipper?
When the practice of a country in certain inyanim is positive, we appreciate it and imitate it and praise them for it. This is the way of chazal.
The ikar of Torah is menschlachkeit. You seem to use the Torah as a vehicle to validate your all-consuming anger. I believe you need to work out your issues, as they have nothing to do with the religion.