Jaguar was historically known for terrible quality control, right? When I was young, the joke was that you had to own two; one to use while the other was in the shop...
Yeah "once great" is definitely a huge exaggeration. They're terribly unreliable. In the 90s we had one Jag in the neighborhood I lived in and it never moved lol. Everyone knew they were junk even back then.
How it usually went (not sure about now, but certainly 10 years ago): Dodge < Jaguar/Landrover < Germans cars < American cars < Japanese cars