KYB gas adjust shocks...

FYI They came out in the 70's just as radial tires were starting to become accepted by the public. I installed my first set on a 72 Challenger in 1977. KYB was/is the largest manufacturer of hydraulic systems in the world. They manufacture landing gear for commercial jetliners. Not a junk product.
All hydraulic fluid shocks "self adjust" ,when in use the internal valving will restrict fluid flow under hard compression. It is not adjustable in the "common" sense in that you don't have programed valving internally that can be switched by a knob or rotation of the shock. Usually to make the shocks extra stiff at normal driving.
Just like calling a camshaft of a certain grind "junk" because you didn't like how it performed for you. You might have the wrong parts combination. Just like it is the combo of parts that makes an engine strong or blah so is the suspension system. The shock absorber or "damper"as originally called is just a part of the total suspension. Springs, shocks, tires, sway bars. weight of the components all add up to the suspension. It depends on the application and expectation of the user. They are different. It always seems to be easier to criticize something just to be negative. Not every body likes the same cars, women or food. Who is wrong or right ??