@Zoe7 Is right, you have the right to feel safe ..... (and I have had a quick flick back here) you are right too ..... the mistreatment you were exposed to as a child will have affected your ability to deal with disrespect to your personal boundaries.
Please talk to your case worker about this ..... either to get involved in support of you, or if you feel that will cause you problems with having somewhere to live, help you with counselling over this new rough treatment you have received from the boss.
If he didn’t know your history, he may not have understood that your circumstances are not the norm, so your responses, and the support you are entitled to are not the norm either, and that might change the outcome for you.
Please try not to turn it inwards on yourself, although that has become a natural thing for you to do ..... please see it for what it is - someone misbehaving and others not understanding how hard it was for you to reach out for support.
Keep looking after you @The-red-centaur ....
We are walking along with you in this .....