Something including such ideas as:
1. Lack of good healing practices. When traumatic shit happens to children, human coping mechanisms tend to set it aside and make up a coping mechanism, which (because our culture mostly doesn’t know about this) tends to get forgotten and treated as truth and becomes part of them. (This can be obviously major stuff like abuse, or stuff that just seemed too had to deal with to them at the time.) They develop with the coping mechanisms forgotten but used as a foundation for their identity and/or habits and outlooks. When related stresses come up, people tend to subconsciously revert to reaction patterns developed at a young age, and their capabilities and orientations tend to reflect the child’s developmental abilities at the time those incidents occurred. Only psychiatrists and other good healers tend to have any idea about this. Instead we tend to have a lot of shaming bullshit that just reinforces it and keeps people hiding their dysfunctional crap rather than getting it healed.
2. Over-emphasis of the masculine over the feminine, and resulting deficient numbers of actual mature emotionally intelligent/healthy adult males.
3. Lack of respect and sovereignty for children and for adults. Our culture (especially culture in the USA) tends to emasculate, shame, and disempower people, from our parent-child relationships to our school systems to our work environments to our banking and legal systems. Treat people like children, and disallow people to be responsible independent people, and encourage obedience and deference to authority, and you get childish adults.
4. Lack of initiation rituals. The few initiation rituals we have are pretty lame and unimpressive and not thought of as such. Since we don’t really grant a lot of authority to our adult people, and require that they surrender to our economic “gotta grovel for a job” and “think you can afford a house? bwahahaha!” expectations, our coming-of-age rituals are pretty lame, and don’t involve a shift to independent respected autonomous self-validating adult.