that's good, because a simple dipole or even the directional antenna ya have now should be picking up less signal from the SW direction when the antenna is facing Southeast. If your receiver has a signal strength indication, try tuning to 88.5, and move the antenna until minimum signal strength indication from 88.5 while still facing 88.9. 88.5 Might be too close and too strong to notice any difference though. Can you physically see the transmitter antenna from 88.5 there, probably at ~ 2.4 miles away? Maybe even try lowering the outdoor antenna closer to ground level, like your car.
That will reduce the amount of signal getting in from the strong locals also. Enough to receive the weaker desired station?? Dunno, but test, test, test and hopefully you will find out.
DB8E/VHF Yagi rotor FM Bandstop ap-8700 preamp 8way split LG lcd.