Your beer should lose quite a bit of that bitterness with extended conditioning. Forget about it for about six months then try a few and see how that works.
I just dumped a two-year old attempt at an American light lager. It had a weird bitterness that did not seem to be from the hops (all Perle IIRC). I tried extended conditioning, blending in the glass, etc. Simply did not like it. In the end, I needed the keg and there was only about two gallons left anyway.
It looked like great beer swirling down the drain, but I will not miss it.