99% of cars will be ruined this way.
Did you lower both ends? If so you end up with a very flat handling car especially at the rear, great for tracks. Where I live its nothing like a track.
OE suspension is generally the best for road use, even aggressive. If it isn't, try a better car.
Not trying to come across snotty, I've actually got two of the same car. One lowered 40mm the other stock. I can do things in the OE suspension car that would throw the lowered one off the road. If I could race myself in both cars, the lowered one wouldn't have a chance.
I suppose its all down to your preference and experience.
This is what annoys me when people on a certain make specific forum complain that their car is undriveable/skittish on B roads after fitting coilovers and track polybushes. Unfortunately 99.9% of road surfaces are nothing like Brands Hatch.