Maybe a lot of guys are trying to vacate at the first RET because of landing traffic behind or to save time.
737s are heavier than A319s so to vacate asap it's best to touch down firmly rather than hold the aircraft off to make a soft touchdown. I'm not an Airbus pilot but my understanding is that they also fly the approach a lot slower than a 737. Again reducing the runway required.
I know runway 22 is classed as a hard landing hot spot as well.
Also it's called Ryanair, not Ryan Air. Pet peeve of mine.