There is a trend in the church today to try to blame every sin and problem on some sort of generational curse. This is not biblical. God’s warning to visit iniquity on future generations is part of the Old Testament Law. A generational curse was a consequence for a specific nation (Israel) for a specific sin (idolatry). The history books of the Old Testament (especially Judges) contain the record of this divine punishment meted out.
The Lord created families as a beautiful extension of His image. Sadly, in our fallen world we are born in a natural sinful state and can only be redeemed by our Creator. Our natural state is selfish at best and pathological at its worst.