Got yelled at today

I am a legal assistant/ paralegal for a partner and its my first job post grad while I apply to law school. He was very happy with my work right off the bat and 6 months in I got a raise (still entry level salary for my region but I am so grateful). He even said I would get a recc. letter for school apps.

Lately, however, I have been forcing myself to stay even though the paralegal only works 2 days a week, I am in person every day alone, I am in trouble or responsible for tech issues, things I had no training on, items past working hours, things my boss actually made errors on, and need to remind him of work or to read my emails. I have made numerous small errors that are very fixable like typos and take all corrections with stride. But it is painful to drive an hour to sit and be yelled at because my boss cannot understand how to refresh a browser tab. Or to be yelled at for not finishing large projects within 1-2 days while also being the sole person responsible for management of every other case - and he does PI, WC, Med Mal, and large borough cases. He would be sarcastic and rude to me about things frequently and constantly tells me to pay attention especially since he found out I have ADHD. Also the commute is a grueling 1-2 hrs and I have to start at 8:30 am.

Today was my worst error to date. I was sick yesterday and today we get an email for scheduling deps that I should not have responded to. This error ruined a strategy for the motion to compel/bar we have had and I was yelled at. He typed an email on monday with multiple paragraphs and the first thing said not to respond to emails. I had it printed but still forgot as I was trying to be proactive about scheduling in this difficult to manage case. I was sick to my stomach and felt awful but also hated that he said I just don’t pay attention to his 5 paragraph email when I read everything and manage so much work - If anything I AM OVERLOADED. He also explained things to me like a baby today and was just disgusted that he had to manage every email I send when he already was micromanaging for the majority of my work since the start. He wants to see everything but then gets IRATE when he has to do “admin work” and cant bill for it. It feels like he spends most of his billable hours bullying me.

I am so nervous about getting my letter now and idk how to handle asking since he is never in a good mood to ask. I also want to quit after 1 year of being here but that won’t be as strong on my resume for both school and finding new jobs.