Ju, in many of your posts you appear to be trying to find English equivalents of expressions in your native language. I understand this - we all do it - but I think you might do better to accept that we sometimes just say what we mean, rather than use a particular expression. For example
1. People in the office always
pinpointspick on/make fun of/criticise/laugh at toNancy no matter what she does.
3. Nancy is so competent in the office that others around are jealous of her.
a. What shall I say Nancy's situation? Exactly what you said above.
b. What shall I say the mentality of those people in the office? They are petty-minded/small-minded/jealous/,...
Student or Learner