You might have given up expecting your new blended family to be same as your previous one. There are lots of differences between the two families. Generally speaking, a new couple sets off on a new life together in nuclear family with supports of friends and love ones.
When a child is born, the couples learn to care for, love and appreciate the child. They also start to redefine each other, moving from partners and lovers to co-parents accepting these relationship changes as they come along simply in a part of the way family life is and ought to be. Also, having children makes the relationship much deeper.
Look at your blended family as unique
The new blended couples make it hard to establish a home together due to the nuclear family. By the time that the new blended family couples establishes a home together, and then have been through many loss, legal battles and heartbreak. Therefore, they are being provoked by experiences in the past. They also suffer usually from recrimination from love ones and friends. So having a blended family is something unique and differs from one couple to another.