You dryhopped at a ratio of 0.50 oz. hops per gallon of beer. For a standard IPA, this is a good ratio. I frequently do 0.50 to 0.75 oz/gal for standard IPAs.
If you don't like the particular character that the dryhop offered, then that is a lesson learned. But perhaps what you dislike about the beer has something to do with the recipe as a whole, so that is something to think about too.
I would drink the beer when it's fresh and let it grow on you. A 2-3 month old homebrewed IPA won't have the same pop and quality of flavor/aroma when compared to a fresher IPA.