As someone who regularly does battle with the interseting winds at BHX I am not surprised to hear it was bumpy. BHX seems to have some very unusual wind effects in the last couple of miles of the approach. I suspect this is due to the small hill just to the side of the airfield. Not big enough to see but sets up some intersting wind. 15 the southerly facing runway is particularly bumpy even in relatively light winds and 33 has a couple of big "holes in the sky" on approach. Makes life more fun though. We do try and keep it as smooth as we can sometimes it just ain't possible.
I hope that explains it and doesn't put you off too much. If the wind is too bad we won't land so although it can feel a bit uncomfortable it is perfectly safe.