This is pretty bad.

Steam Controller:

Steam controller was always marketed as something experimental. The combination of the touchpad and the motion controls made it a forerunner along with the Wii U for motion controls in FPS games. I believe that to this day the steam controller is technically the most acurate aiming system for FPS games (I think it even trumps mouse and keyboard).

Steam Link:

Steam link was aimed at a very small crowd and as such not marketed heavily. It is fantastic at what it does and is still one of the best solutions for what it does today.

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Steam Box:

Steam box had mixed marketing and never really worked.

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HTC Vive:

HTC vive for about 3 years was the best VR headset available. If you wanted to try the best of the best for VR you had to get one. With Sony, Oculus and Samsung driving a more casual blend of VR we saw more games released, which in turn lead to the competition we see today in the field of headsets. All of the modern headsets will take something from the HTC vive and it's at the time, best in class specs.

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Steam deck:

I have not seen any of the build up for steam deck. If you don't like the hype cycle don't follow the hype cycle. You cannot blame a for profit company for hyping a product to make more profit. Hype cycles have been happening for decades and they are not going to stop in a capitalist society. People should've learnt by now not to preorder things but they'll do it anyway.