How to deal with difficult and unsupportive manager?

I’m a senior credit analyst at a fintech, working remotely. I joined this firm for about a year and the first half was great when I used to work with my old manager. He and I worked, collaborated and supported each other very well. I was left with an excellent year-end review from him.
However, he had to move to a different department so I’m left with this manager, who has been working for the company for a long time. Maybe that’s why she micromanages me every little thing and judges me harshly if I do not know about something and ask her questions. When I ask, she would answer and then say something like ‘Why don’t you know about this? I’m concerned about you’. When I do not ask but try to give a feedback/comment on a project, she would not listen and did not give me any good reason for why not. She’s freaked out whenever there are problems or little mistakes that I made and criticized my ability as if I’m the only person in charge of this mistake while she’s my manger and I submitted the work to her and she approved it. The last straw would be when I submitted a data report and she did not even check but said I did it wrong because the number is too big to be true. She said I needed to ‘use common sense’ when working (this hurts a lot). I nervously checked my work and couldn’t find an error. I asked her where I made the mistake. After she checked, she said there’s no mistake but I could have presented it better. She always finds reasons for blaming things on me and does not apologize for making me doing ineffective work for 3 hours.

She now puts me in an improvement plan. I try to keep a professional attitude and work very hard, 12-14 hrs/day but it’s not enough to her. She still complains that ‘I could have done better’ because she cannot find any mistake in my work. I think she might have a problem with me but I don’t know why. I’m super stressed out and even have a PTSD whenever I see a notification about her comment/reply when I ask or submit something to me because I know she would always criticize. She has never said something nice to me even a single time.

I try to be fair and ask myself if I can still do better. But I absolutely tried my best. I got great feedback from my ex manager but not with this person, so it’s probably about the fitting problem. I cannot ask to transfer to another position at the company and the market is very soft now. But I guess I have to move on from this manager and this company sooner or later…

This is the first time I got this issue. Curious to hear if you got into this problem before or what would you do if you were me?