<em>Becca never tried to complete anything she </em><em>was </em><em>resolved to do.</em>
The adjective "resolved" can be used in the expression "be resolved to do something" when it means "be determined to do something". The mistake in this case was that the writer had used the verb "have" instead of the verb "be".
Another example:
After his divorce, he was resolved to move on with his life.
