There are contracts that are basically impossible to terminate and offer basically no benefit to anyone, timeshares is a key example of it.

A problem with our contract law is that if you get anything out of a contract it becomes really hard to terminate if the terms don't allow for it (a peppercorn). With contracts now being written in dense legalese with multiple pages of terms and conditions, it's not really feasible to expect the common contractor to have a full understanding of exactly what they are signing up for.