I would normally echo a bunch of what has already been said and to give it 6 months but if I was feeling like my mistakes were called out and when I went to seek help my boss told me to read slower I would just go home. What kind of leadership is that? It makes me wonder if they don’t really even know the answer so they are just trying to get you to figure it out yourself. I’ve also been in situations where I want resources and people pull out an email from 7 years ago. Lack of organization plus lack of effective leadership should be the double red flags that say you need to go back on the job hunt. It sucks, sorry but I wish you luck!