[7luminaries]

It sounds like it could genuinely help.
You could imagine the best on paper and then realise that the reality may have sometimes had moments of kindness or decency amidst the harsher day-to-day reality. In even your worst times (childhood, teens), you may have experienced a joy in this existence, a taste of what may come when you are able to better nurture and surround yourself with kindness and respect.

Some folks are genuinely nice or kind to most folks and many others are nice if you are nice to them. Others see people and situations as things to be used to their advantage.

Generally, it is healthy to have standards of kindness as well as respect & courtesy for those in your life as an adult. You don't have to associate with parents much or at all, if they cannot meet these minimum standards, which are reasonable. Likewise, for the rest of your life...put a focus, a premium, on kindness and respect...and go to and be with those people and places and those areas where you are accepted and treated well.

The key is that you have to find out for yourself where to draw your line at minimum decency, minimum kindness, and minimum respect or regard. You may not have had good models to show you that by example or by their treatment of you. You may need to set the bar much higher on kindness and respect than you have experienced...and you need to protect yourself and walk away when you are not receiving the bare minimum of human decency.

Writing about your ideal personal narrative for your childhood, teens, etc., can help you better understand where those "lines in the sand" are moving forward, i.e. how you think it should be and needs to be...and IMO that is where the healing will continue

Peace & blessings
7L