Why do many Malaysians lack basic train etiquette? (also a rant)

At the MRT station, many people weren't standing on the left side of the escalator, and many were eating and drinking in the station and train, people also weren't lining up at the platform, and neither do they allow passengers to exit the train first before entering the train. And in the trains, there will always be people playing loud noise from their phones or talk loudly.

zzzz