Children who have experienced absent and/or abusive parents tend to have less experience in positive environments while growing up due to their insecure attachment, thus their ability to function and communicate with others is very strained and distressful. Their well-being is below that of their peers. (hetereonormative example) If the child is male and his mother was abusive, he will tend to have a strong discomfort towards women, which places him at a lower chance of finding romance and being comfortable in it.
I agree. Evidence supports that such abuse often translates into the reactions you stated. It also seems to me that these experiences build upon each other quite heavily. An initial setback will compound itself because others are continually advancing and not communicating properly will further ostracize you, essentially repeating the process.
I agree, and I would also like to add that a parent does not necessarily need to be absent or abusive for the negative effects to occur in development. It has also been shown that children of mothers who are depressed, neurotic, or anxious are less likely to have secure attachments. For this reason, I think it that the attachment style depends on the way the parents act. Obviously, children of abusive parents will have a less secure attachment style, and this can be an indicator of a less secure lifestyle to come. However, also children of unstable or insecure parents can develop a less secure attachment style, and this can mean that later on in life they encounter more problems-not because of the attachment style, but because of the actions of the parent(s) which caused the attachment style.