NC as don't want this linked to my other posts. This may be long.
I'm stuck in lockdown with my 'D'M and it's becoming unbearable. We both live alone so we decided I stay for a few days because I was struggling with not going out or seeing anyone for months, I assume she was too, although she goes out to work so has more social contact than me. It was supposed to be a few days, then she decided to go on a last minute holiday (I know 
) so I looked after her cats for two weeks, and sorted shit out (food deliveries etc) while she was in quarantine afterwards, and then within a few days we'd gone into Lockdown 2.0.
She's bossy and controlling, but generally I can 'manage' her for an easy life. Mostly this means waiting on her hand and foot which is a double edged sword. If I don't, she huffs and strops about doing anything and calls me lazy and causes a row, and if I do, I make a rod for my own back and she expects it. She sits in her room all day like a queen, all meals cooked, drinks made, I've even ordered and paid for all the food and she's just told me what she wanted.
Anyway I work long hours from home, and have a tight deadline to meet tomorrow. She's gone out to work and said can you do 'x y and z' today, which are not small jobs - think hoovering and dusting the whole house rather than washing up iyswim (she's having a bit of work/DIY done so there's a lot of mess/dust/displaced clutter that needs sorting). I said I'd see what I could get to, but reminded her of my deadline which had to be priority. She started to lose her temper, shout over me, belittle me and call me names. I'm so used to this I clam up and now when I recall the exchange, I've blocked out a lot of details 
but she wanted me to spend most of the day doing what she wanted rather than working. I reminded her that if I had to go out to work then it would just have to wait (it's already waited weeks and weeks, what is one more day!), and she has this habit of just shouting over me with insults or even just 'lalala' when I reply with anything other than 'yes' to her demands
I have my own place, but she lives rural and I don't drive. I don't even know if buses are running (they're sporadic even pre covid) and I don't want to get on a bus anyway.
I'm just sitting here trying not to cry because she's made me feel as small and insignificant as she did every day of my childhood. I hate that feeling of being stuck and forced to bend to her whims rather than my needs.
She's also spiteful in that she needed an expensive item, so I offered to put it on my 0% credit card and her pay me back, and even researched and ordered a fantastic black friday deal for her. It's arrived and she's ignored it for days. I suspected she felt she was somehow relinquishing control by 'having' to be grateful to me for sorting it, so I've ignored it. But now she's said, 'make sure you send that back, I don't want it'. I know she's cutting her nose off to spite her face just to be nasty and make me feel not good enough but it still really hurt. To be clear, it's exactly the item she wants and I got it far cheaper than she can get elsewhere.
Even when lockdown is over we're likely to be tier 3 so when I do go home I'll be back lonely and isolated again. I just hate that I'm in my late 20s and that I can still be reduced to tears by her tantrums and demands. I feel so trapped and frustrated.