£60 a week is enough for DD. My question was how do young people who don't have parents to support them survive?
One of the things here is she is assessed on the basis of who she lives with.
If you live with others your costs go down.
A 19 year old who is in education wouldn't get benefits. They would be viewed as a dependent, even if parents refused to cough up money for their educational costs unless they were able to actively demonstrate they were a non dependent (onus to prove this is on the 19 year old).
As far as Universal Credit are concerned, yes she partly is the OPs responsibility. As for £25 on food, its not easy but it is possible if you cook and eat as a household to keep your per head cost very low.
As for accessing help, yes her condition is part of the issue but she also is making an active choice that she will not do x, y or z too on some occasions. Because she can and she feels that this is something that gives her a degree of control. She will continue to do this as long as she is enabled by you or until she has such a big crisis you feel you need to have a mental health intervention against her will for her own safety.
Its a really awful situation to be in, but the reality may well be that you protecting her, which is your natural instinct, may actually be fuelling the dependency and may prolong the problem and therefore may not actually be in her interests.
The alternative is she has to reach a point where she wants help and thats either through an epiphany moment (which is unlikely in a scenario where she is effectively comfortable) or an active crisis. Basically the most likely route out is through hitting absolute rock bottom and she either makes an active decision to change something or she hits crisis.
You may find that you have a terrible decision to make at some point.
I say this as someone with a long history of diagnosed anxiety issues and difficulties accessing help.
Anyway thats quite separate from a single young person not living with family and not getting benefits (and I made it clear, i think some really don't get enough help). Your daughters situation really isn't a priority for more money. If anything, again, it may cause more not less issues if she did get more.
Its awful but she is making a number of excuses, which are not purely anxiety driven. And even those that are anxiety driven, she has to be made to understand that its a choice between x and y, and if she chooses one route you may eventually need to act against her wishes. Opting out, is a choice to a degree. Its a choice for someone to intervene. Staying in her comfort zone will never changes things. And she doesn't want it to change because she's comfortable and mum will look after her.
It truly sucks, but the problem isn't UC in this case. Blaming it on UC is lashing back at the injustice you've faced.
UC is problematic for others in a dreadful way, but you are trying to piggy back on that injustice to somehow make your own more legitimate and sympathy gaining too. Its possible to have sympathy without that and also acknowledge that your daughter is actively being obstructive at times too and there may be a limit to how much you can help her and you may have to come to that conclusion that you may have to manage a crisis by removing your support in order to get outside support because there will always be a reason why your daughter refuses to do x, y or z otherwise.
Its not fair. But that is how it may be.