Your scenario demonstrate that simpler the antenna the better. The amplifier gain on antenna tend to make any usable signal worse by amplifying the noise along with the signal.

Couple of things you can do to improve the reception:

1. Turn off the antenna’s amplifier.
2. Position your antenna as high as possible and keep it away from being too close to wall or obstructions. And rotate it for reception.

You may also want to go by Radio shack and buy their simple FM [only] antenna for $3.99 and string it as high as possible.

Good luck.