Ah, British Leyland… the company with the unspeakable talent of fucking up a good thing, no matter how easy it would have been to just evolve a new model.
They made some stunning looking cars, that all completely sucked on a technical level. Some people call me crazy, but I still love the styling of the Princess. Sure, with a name like that it was doomed to fail, and the fact that it rusted away within 3 years of construction didn’t help… but what a stunner to look at! Then again, maybe I’m weird.
Anyway, Bad Sports Cars.
I’ve got another controversial one. As so often, the product of a merger or takeover.
The early 70’s Citroën SM.
Don’t get me wrong, in terms of styling, it’s one of the most beautiful cars ever built, being as it is based on the DS platform. But it was built shortly after Citroën bought Maserati. They needed a quick image builder to recuperate the cost of the purchase, and the SM was it. FYI, the investment was never earned back, and Citroën fell into the claws of Peugeot in the late 70’s.
The SM was billed as a sports coupé, but in reality, it was only the Maserati engine that could give it some street cred in that regard. The suspension was Citroën-comfy, the brakes were alarmingly poor, and the car cornered worse than an American sports car. 
And as all Citroëns after 1935, it was front wheel drive…
(Yes, I’ve driven one, it’s magnificent. But not a sports car by any stretch of the imagination!)