I think it would be worth trying another round of dry hopping. If it salvages the batch great, if not, not much of an extra cost.
Not refrigerating hops & yeast is a mistake for any LHBS. Many hops are only good for 5-6 months at room temperature.
Remember one unassailable statistic, as explained by the late, great George Carlin: "Just think of how stupid the average person is, and then realize half of them are even stupider!"
"I would like to die on Mars, just not on impact." Elon Musk