I’m sorry, Anon, and I hope you don’t beat yourself up too much. You did what you had to do in the moment to keep your sanity.
I rage quit my first “real job” out of college. I was treated so poorly and there was a final straw that I don’t even remember, but I do remember that I rage quit on the spot, grabbed a box and cleared my desk and left, no plan in place. I was a single 23-year-old with no safety net and no idea how I was going to support myself. But it all worked out eventually.