Yea, they despised the pleasant land. The psalmist passes to the consideration of another sin. After the ill report of the spies (Numbers 13:27-33), the Israelites "despised" the land promised to them (Numbers 14:31), and relinquished all desire for it.
They were ready to have turned back into Egypt (Numbers 14:3). They believed not his word; i.e. his promise to give them the land (Genesis 15:18-21; Exodus 23:31, etc.).