Flexible work or resign?

[Holsteiq]

I am a mum of 2 girls age 2 and 5. I started a job at my daughters primary school last September and basically from the first week one of the senior teachers has enjoyed making me feel like a piece of crap. Anything I say she puts down or disagrees with and loves to try and put blame on me for anything when 99% i know nothing about it or have anything to do with it.
About 8 weeks ago a supervisor took me aside and asked why was I making small errors and not on top of my game? I broke down and started crying saying I'm down and finding it have brain fog. Basically I've been diagnosed with anxiety and depression and this has all come from this job! It has been a bit better last 2 weeks and staff have made more effort to chat and talk to me but still the one senior teacher can be odd occasionally.
I have to make a decision by Monday do I resign as it has made me miserable or stay but requesting 2 day week rather than a 3 day week. I probably know what I should do and just leave as I haven't felt happy all year and not sure how I have stayed the whole year.
I didn't realise how ungrateful workplaces can be when someone works really hard but they don't acknowledge it or notice if someone struggles etc.
I'm very tired but worried my daughter will suffer in hands of said teacher if I leave
And what will my last month be like from her :(

I am sorry you are going through this OP.

But I would first try to make an official complaint about the person who is constantly putting you down/criticising you.

If you generally enjoy the job and they are the only issues then I don't see why you should let the bully win...

Be gentle with yourself, sounds like you're being micromanaged. The pressure is making you fight/ flight and most likely second guessing yourself with every task.

You're still very new to the role.
Take your time, breathe. You can do the job and very capable too. Otherwise they wouldn't have hired you.

Do what feels right, if reducing another day makes financial sense do that but... if you're sat at home dreading going into work then I'd say look for something else maybe the role is not for you. Also you need a different hat on, what they are asking or how they approach you, is it right or do you feel they are bullying you? Speak to HR if needed.

Don't worry about the teacher may mistreat your child/ create an atmosphere, people are always moving on at schools because the working environment doesn't suit everyone. When you're a parent, not staff that's very different.

Best wishes

You only have a few weeks left to work before the summer holidays. Why don’t you wait and see how you feel after the long break? You could use the time to look for another job in a different school or a new position in a different field.
Some people are awful to work for and I wouldn’t stay there if it’s truly making you feel depressed. However, plan your exit so that you are not left without an income or another job to go to.

It sounds like they are bullying you and really impacting your mental health. I will resign and look for another job before it impacts you further and is too late.