The two stories mentioned are very representative of their true nature. Where is the "tying of heart strings"? How does "whipping" your child bring either of you closer to one another? Why must "whipping" be the preferred or only tool?
Have I read all of their stuff? No. I have read parts of TTUAC and needed to stop because I was getting nauseas.
You don't need to read all their writings in order to get a representative sample of what they believe, preach and practice.
FTR, I own and have read CTBHHM and there is more of their bad theology as well.
ETA: Yes, he does believe children's wills should be broken down. It is in his writing. In his constant comparison of children to various animals (i.e., dogs, mules), he gives the comparison that like you break an animal, you need to break your child.