OMG @Gladya72 your DD sounds like a nightmare. I know a woman who has a daughter like this... 34 y.o. now and has left home and been back four times. One bad relationship after another, finished 3 jobs voluntarily because she CBA, and has been currently sponging off her parents for the past year. No job, and no attempt to get one. Her parents enable her by letting her do it.
They have another daughter too who is 4 years younger, has 2 kids by 2 different men, and moved back in, in October 2022 (with both kids,) after the second relationship broke down (She moved back in after the first one broke down too.) Doesn't help that she knew the fuckers for about 8 weeks before getting pregnant by them! Barely knew them, before deciding to have a baby with them!
My 2 DD left home for uni at 18 and never came back, (both in their late 20s now, and live 15-18 miles away.) Both lived with mates for a year or so, and then moved in with their partners at around 24-25. Both own their own home now with said partners. I left home at 24 and moved in with DH. Over 30 years later I am still with him. NEVER went back home.
I know life throws some curveballs - but the OP's DD, and the DC of the women I know, just take the fucking piss. I would have lost my shit if my DD had behaved like this. Thing is, I do know quite a number of people whose adult DC keep coming back, can't keep a relationship going for more than 6 months, and can't stay in a job for more than 4-5 months. They keep moving back, and are still boomeranging to and from their parents homes in their mid to late THIRTIES. Several of them are in their FORTIES.
Some people just never grow up. As I said, some of the parents have to take some of the blame, for enabling them!