Having suspension problems with my 2007 Honda Accord

There's a noticeable steering wheel shake at 75 mph. It worse when going 80-85mph. I have bought new wheels, tires, replaced front struts (done at the Honda dealer), driver's side tie rod and have done at least 3 alignments and still have the problem. Also when I let go of the wheel the car goes to the left. When I drive over humpy bridges, instead of the jumping going up and down like other cars do this car jumps sideways. What could be the problem?

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