Should I just quit?

[ColdMarch]

I started a new job as a support worker last week and it's just been hell, I was originally supposed to do 18 hours a week but people keep quitting so I ended up working 10 night shifts pretty much back to back and there each at least 12.5 hours.
Without getting in to unnecessary details it's been rushed and the staff weren't given any information before we started and now we're stuck supporting a service user that attacks female staff every single day.
I've already been attacked twice and been injured but the managers aren't taking it seriously despite them both being attacked themselves.
My family tell me I should quit and the constant stress of being on edge is really getting to me, I had to wait outside at night in the rain for an hour for him to get bored of trying to get at me and go to bed.
I love being a support worker and I've tried really hard but it's it just time to tell them I can't come back?

Go. You have tried your very best but ultimately no one will thank you for damaging your own physical and mental health by continuing.
Just make sure that everything is documented and that the ultimate head of the organisation is informed of the reason you’re leaving.

Of course you should just quit. No job is worth this, and if you don't get out very soon, the stress of this could impact you for a very long time. Your mental health trumps this job, always.

Go. Inadequate staffing is not your problem to fix.

Yes!

Report concerns to CQC and go. This situation is not safe

Quit, and consider informing your local council’s social care department and CQC of the issues re inadequate staff training, turnover and poor management of behaviour that challenges.

Yes leave. Some support worker roles are too dangerous. Sign up to agencies and start getting the shifts you want.

Leave . Their poor management,high turnover, lack of staff etc are not your responsibility or your fault. Their lack of intervention when made aware of issues don't bode well for the future.

I had my old job for a month. The interview was for one role, but when I started I was a given a completely different one. No induction, no training. Just wing it. I had no idea if I was doing well or even ok. If the things I did were acceptable and constantly felt like I was failing the child I was working with. Got attacked a few times too. No further training despite my complaints because "no one has time to hold your hand and you can either do the job or you can't " or "oh,you're fine". It wasn't fine . I quit.

You're being completely reasonable in deciding to quit. You're being placed in a dangerous situation which is an unwise decision for your health and safety. As above posters have suggested, advise your Local Authority and the CQC. Don't allow yourself to be bullied by your employer. Good luck.