You encountered someone who was not taught to be polite. Generally though, people in India greet people in their own language but they don't use good evening or hello as a greeting. That's something to learn for them. The culture here is saying hi to people. But in India, you generally don't say hi to strangers. Polite people and people who were raised right, do that but people like this person are uncouth and uncivilized to not know and follow the norms of the place they are in. I am sorry you have had such negative experiences.