Camry suddenly rocks left/right, pulls to left

My 1997 Camry (had it for 3 years) has developed a fault where I feel like I'm on a rocking boat in high seas!

At any speed when I release the steering wheel, it veers to the left and steering wheel spontaneously turns counter-clockwise. At low speeds, you can feel a definite left/right rocking motion, and the steering wheel rocks left/right with a bias to turning counter-clockwise. The rocking motion is twice per second at low speed, so I not sure if its tyre problem. At higher speeds it feels like a rocking boat.

I've checked the type pressure & run my hand around the tyres, all good.

Recent maintenance was to take off each wheel, inspect each wheel, & spray WD-40 in the wheel nuts. I just confirmed all the wheel nuts are tight. The rubber part at the top of the suspension is mostly worn away too so I see a stainless steel rod.

Edit; Replaced the left front wheel with the (new) spare, drove around the block, same issue.

u/dsmaxwell No play when I shake the wheel in the air. Wheel did not rotate freely so maybe a wheel bearing. No trees or objects near the brakes, What I did see is the rubber flange surrounding the front axle, behind the brakes closer to the motor, has a hole so anything could have gone in there.