If you have unlikeable or antagonistic characters in children's stories (thinking more of the age 9+ range here) is it essential to bring some sympathy to them as well?
I've been advised that my 'bad' characters are too one dimensional. Yet when I think of say Matilda's parents, I fail to see much sympathy for or redeeming qualities about them.
Possibly a back story is needed to bring sympathy and I know it is done in some of he best children's books e.g. Mrs Coulter