You asked how can I control my emotions around toxic coworkers.

First these coworkers are not toxic. Nothing you’ve written says that they rise to that level.

You need insight into your thinking ing process to control your emotions. You seem to hate yourself so you ascribe bad qualities to normal behavior.

The woman who said big mama. Was likely brought up to think skinny is good. And was insecure and wanted you to affirm that. Instead you were insulted and told her off. She did apologize. So this is over with. Let it go. But no you are determined to “punish” her for your feeling bad. That bad feeling comes from your thought not hers.

Separate incident, three people did not respond to your good morning. That’s not toxic. It’s not an attack. There can be many reasons and none of them have to do with you. You need to change your thoughts from negative to positive to control you negative emotion. Instead of saying they are rude, they hate me, say they are self preoccupied and are not even thinking about me. And let it go. Then your emotion will not be a hateful one.

To change you emotions you need to change your thoughts, which seem to come from a place of self hate.