You'll clash with someone who seems to want to publicly humiliate you. There's no reason to be a human punching bag. The sooner you stand up for yourself, the happier you will be. It may be necessary to leave your job. Subjecting yourself to continual abuse is undermining your health. You can't lose any more sleep. As soon as you leave this toxic situation, you'll feel much better. Give yourself time to find a job that makes you feel supported and appreciated.