2. Ignore those who marginalize you.
You should thank those who marginalize you, because they have time to marginalize others, so they won't have time to improve themselves. You can open your eyes. At this time, at this age of struggle, they are engaged in some intrigue all day, while you are trying to improve your study. Then 10 years later, you will be better than them.
And 10 years later, they probably have no skills, only some intrigue. Such people are often more likely to be laid off by companies.
3. Do the right thing and know how to reply to the leader.
Do what you have to do. Don't take your present job seriously just because the other person marginalized you. At this time, although your task is not much, you should do it with your heart.
Otherwise, I'll fire you and say you. And you do what you have to do, even if others say it, it won't affect you.
And they will be very uncomfortable, because in their eyes, you should be very weak and helpless at this time, not calm and self-sustaining.
In this way, others can't give you trouble and put you at a disadvantage.
If you are marginalized, these are the paths you can take.