Which ones did you get?
I got these and the difference was night and day.I will definitely consider some aftermarket ones then. I was saying it coming from a car much much worse for mud being sprayed up the sills!
At first, I wasn't going to replace them, but on the white, the dirt/muck was too much to ignore. Don't even bother with the added extensions that were supplied with the car, utter useless imo - hardly any clearance at all.