Boyfriend's parents object, because of superstition, but also because they dislike my income is not high enough. What should I do?

You can take the initiative to chat with the man's parents. The most important thing is to show them that you really love each other, that you are happy together, and that the man is happy. Because the man is the eldest son, his parents will attach great importance to his opinion, but you must not say that they are superstitious, otherwise they will only treat you worse and will not accept you. You can also make a play with your boyfriend, such as finding another fortune teller and bribing him to say something nice.