Should we not only focus on our own deeds?

Yes, we should focus on our own deeds, but we have to look at the deeds of those who are around us also especially those who are under our authority like our children. We should look at the deeds of our spouses and relatives, etc. in order to correct and change them, but greater focus would be on our own-self and then our families.

“O you who have believed, protect yourselves and your families from a Fire whose fuel is people and stones, over which are [appointed] angels, harsh and severe; they do not disobey Allah in what He commands them but do what they are commanded.”[1]

Reference:

[1] [Qur’an 66:6]