You hit your OG high, and so it tastes too strong? Go figure...
It might sound crazy, but you could try watering it down. After you draw off a few pints, top up the keg again with clean boiled oxygen-free water, and see if you like it better that way. Or to know for certain, put into your glass a half inch of water with every pint and see if it's a little more easily drinkable that way.