I’ll start with the Porsche 997, the 996 looked alright imo, but it looks “like a 90s Porsche”, the 997 made it look sleeker and more modern. Still looks good today.
As for cars that looked worse after a facelift? Maybe the facelifted 6th gen Camaro? The 6th gen looked great pre-facelift, but they did something weird with the headlights and now it looks so-so…
Technically, the L322 Range Rover had two facelifts: one in 2005/6 and one in 2009/10. And really, the 2006 was an odd one-year model with the exterior facelift and new Jaguar engines, but most of the BMW-era interior. So, it was more like 2003-2005 -> 2006 -> 2007-2009 -> 2010-2012 (US model years).