😔 😟 🙁 😢 😭 😿
Oh OP. I cannot tell you how much I can empathise with your post.
In the not too distant past, I also had a TA who drove me to the actual point of insanity. I'm not even joking. My entire personality changed for the duration of the time we worked together (one academic year).
She would frequently strike up conversations with the children when I was getting them settled, say the silliest, most inappropriate things to the children, not supervise them properly and meanwhile she would also tend to drift in and out of 'consciousness' as she seemed to be dissociating off and off through the day. If I asked her to set up an activity, after explaining it in detail, she would get confused and do it wrong, or not do it, or do something completely different to what I asked. If I asked her to set the tables up for a writing activity she would give everyone blunt pencils. She was an experienced TA but didn't understand anything about how children learned and couldn't do the simplest task without messing it up. Oh my goodness, the constant RAGE I had to suppress all day, every day, and I am usually a very relaxed and chilled person. I don't have a temper at all and there were several times I had to leave the classroom to basically silently scream into the abyss! There were times when I would just cry would utter frustration. Once, I asked her to take a small group out to do a writing assessment and saw that she had written down everything for them to copy. I had already told her that we can't give the children the answers during assessments and I know previous colleagues had told her the exact same thing. When I said 'So nobody did anything independently?' She would just look sheepish and say 'um, no'.
I was very, very direct in my communication. It didn't make any difference. I constantly reported it to management and aside from a mediation session between us at the end of Term 1, nothing was done. I kept reporting everything back to SMT amd nobody did anything! This TA had a terrible reputation but for reasons unknown to me, nobody intervened.
But the end of Term 2, I almost had a nervous breakdown and actually went off sick for a short while. Working with this person was making me really unwell, emotionally, mentally and physically. It was like banging my head off a brick wall. When I returned, I told SMT that I would leave if they put me with her the following year. I had an actual calendar that I would cross off each day, like a prisoner!
There are no words to express how working with this person changed me that year. Even now it seems crazy to say but it was absolutely dreadful. By the time I came back from being off sick, I decided to just mentally block her out as much as I could while still being polite and professional. I'd tried every other approach and really just needed to get to the end of the year.
I now have a wonderful TA who you would have to prise out of my cold, dead hands. The difference in my day to day life is astounding!
One thing I have learned is that time does pass and this will be over for you, and then it will be one of life's experiences in your belt, OP. I'm sorry I can't help more, but it will pass.