The reason for the weak personality? Family, friends, community, or the person himself

Why do we find people with a strong personality? And weak personality? Who has the primary influence on a person’s personality, are the family, friends, or community, or is the person himself?

In my opinion, more than one who controls the weakness of personality is the family, they are the basic building block in a person’s life from the moment of his birth and he spends most of his time with them. It becomes weak personality.

What do you think, what is the reason for the weak personality? Family, friends, community, or the person himself