Bad noise in passenger rear, ride is extremely stiff?

This car has no rear sway bar, but every time the passenger rear wheel goes over a bump, it sounds exactly how busted sway bar links sounds. Squeaky, rattly and clanky at the same time, but only around the rear passenger wheel.

The car has an extremely stiff ride. I mean, extremely stiff. It is extremely uncomfortable to drive. I’ve already replaced both the front struts and rear shocks with Billsteins, and it made a very little change. The car is stock ride height.

I've inspected the under carriage and nothing seems to be broken. All I can think of is The Control arm bushings are gone, or the wheel bearing is shot. But it doesn’t wurrrr it clanks...