I've watched a few friends with unmanaged ADHD completely overwhelm their spaces and housemates with clutter and mess from endless hobbies and half finished projects. It is so painful and I don't really know how to support them.

Like it's unpleasant and somewhat dangerous to be in their spaces, their partners and even children are incredibly frustrated with the environment, they get in trouble with property managers for safety issues. Absolutely no one except them thinks their living space is a safe or pleasant place to be. Yet their response is always 100% angry defence about how it's not actually a problem and other people should clean too and they deserve to have hobbies.

Meanwhile, their 7yo child literally cries about how overwhelming and dirty the living room is and wants to stay with their grandparents and their marriage is completely falling apart over the issue.

Like how do you be helpful when this is happening and all they have are complaints about how other people won't let them have hobbies or are clean freaks?