In fact, if you were to suggest a possible solution to them, they would come up with an excuse or valid sounding reason on why your suggestion wouldn’t work. And the more you tried to help, the more flaws they’d find in your logic.
The hard truth is that some people don’t want to change nor do they want others around them to help them change. People like this refuse to acknowledge the role they play in their misery and often blame others for their suffering.
If you are intertwined with someone like this, you might have to be careful that you are not helping to enable this behavior. This type of person may find comfort in your attention to their misery. And as long as they are getting their needs met, they may not mind if you become miserable along with them as you try to help them.