I felt many of these stories as I read through this thread. I had a rough patch in my late teens and early 20s as I learned to live on my own. A mother with mental health issues and who also ran my life didn't leave me with the tools I needed to live on my own when I left for college, so I fell on my face when I was 750 miles away from home. Happily no addictions or anything like that, I just needed time to grow up. Quit college after 2 years, moved out and worked in the real world. My father instilled a good work ethic starting when I was 13 so I knew how to make a buck. I always knew I needed that parchment so I put myself through college and ended up near the top of my class, graduating at 27, recruited into my career, and retired at 50. But when I was still young and maturing I married someone who turned out to be an addict which blew up 8 years ago. My case was stunted emotional development due to my mother's problems, which also attracted another permanently stunted person as my now-ex wife. But I always took personal responsibility and knew I needed to do well, if anything to "show them". Things are great now, including a very stable, mature and attractive fiancé.
My youngest daughter has excelled, she'll be making 6 figures soon when she starts the 2nd year of her career, and she enjoys what she's doing. Her older sister ... not so much. She lives with me, still, at 25. Doesn't accept responsibility for anything, lies at times, spends so much time in her room gaming. She's held 2 jobs long-term, but got fired from her main job in the spring and went on what she describes as a deserved wild spending spree (her mother's 2nd addiction was a spending problem; the echoes are deafening). Took advantage of me, telling me she didn't have any money because she had been fired, so I covered all of her expenses for months. I've since reviewed her accounts and know that was far from true. And have been repaid. Working on a budget, that's our next step. But she's never worked full time and has come up with every excuse why she can't. Mostly blaming every problem in her life on ADHD (she was diagnosed when she was young), and when she sends me some latest Tik Toc video that "explains" how this thing, or that thing, is always because of ADHD, I always point out that this latest "thing" is something 95% of all adults deal with on a daily basis. But I'm always told I'm wrong. There are glimmers that she'll turn out as a responsible adult and maybe she just needs extra time like I did. Buys all her own food, has kept jobs long-term, is occasionally unexpectantly generous. We funded a 529 for her, and she's 2/3 through college, if she would just get ANY degree her income could double (ignoring that pesky full-time thing). It is all about that personal responsibility. We'll have a cross-roads soon enough, I'm getting re-married and at some point we'll combine households. My daughter will be forced to spread her wings at that point. And I'm going to have to let her fall on her face, if necessary.