Hi.
I can understand that being surrounded by narcissistic people can be very difficult.
Narcissistic people often use guilt, shame, fear and even intimidation. It can indeed make the environment very toxic.
In order to be able to help you, it is first important to understand who is the person and what is the relationship between you and that person. How are they exactly affecting you? Whether THEY need help because some narcissists in fact have feelings of inadequacy and low self esteem.
Few general tips :-
1. You have to accept them.
2. Speak up but have a gentle approach.
3. Set up boundaries and keep them.
4. Do not argue. Narcissists want to trigger you. If you do not argue, they are disarmed.
5. Find support for yourself.
Next Steps
Consult a mental health professional for in person or online sessions.