How to apply meditation in the following difficult situations

I have been practicing vipassanā and mettā at least six months and I have embraced the teachings and practice in my everyday life. However there are certain situations in life where I find difficult to apply the teachings, which are the following: - How to respond to hate and violence to oneself - How to deal with hypocrisy - How to respond in situations of injustice - How to deal when someone abuses of your kindness - How to deal when someone takes advantage of your good intentions - How to apply the teachings in a society where oneself and ego predominates I hope somebody can give me insights on how to deal with those situations. Thank you. EDIT: Thank you everyone for your responses so far. I have learned something new in every single one of them. To be more clear regarding the questions, the objective is how to find the balance in embracing the teachings in our interactions with other beings, but also living by the rules of the capitalism society, which most of us lives on. As an example, consider the following: someone treats you with bad speech in front of others, and you react mindfully. In the society we live in, if you do not defend yourself and let it happen, it is highly probable that he will do it again, or others will start to take advantage of you, since you are not defending yourself. How to balance this?