Feeling anxious and burnout

I was laid off from my last company and joined my current company 6 months back. I'm a product manager and right now - all I'm doing is project management and product operations / product analytics. I used to think I was good at my work (at least before my layoff, because I had a good rapport with all the teams, the manager was appreciative, work was going well and then bam..I was laid off - this has affected my self confidence) but my current manager keeps insulting me everyday as if I'm not fit to work at all. He constantly keeps scolding me, everyday for each and every task. I'm not really someone who talks back or stands up for themselves, but when I finally did he said that I'm arguing for everything. The manager is rude only to some of us. And most of my colleagues just shrug it off, but I'm kinda emotional and not able to let go of the things he said.

Now I have started to think maybe I wasn't good and that's why I was laid off. I'm completely lost and don't feel like working at all. I'm thinking of starting a side hustle and then quit the job even if the salary is less. But I don't want to feel like a quitter. I don't want to be the person who shy away from responsibilities. Am just not sure who I am anymore, what should I do?