Stayed two hours past the end of my shift doing dishes, get called out in the group chat for not washing bubblers that I didn’t take down

What the title says. I came in to seeing first shift had left some dirty dishes, they took down the bubblers (drink making machine kind of), and left them. I had never washed them and didn’t know how. I was there until 1 am doing dishes. Get texted in the morning about how they “don’t leave dishes” and how “we have a standard.” I’ve also been called out and humiliated in front of other employees by the boss.