A company is allowed to iterate on products, and yes that sometimes includes discontinuing a specific product, but that's not necessarily the same as abandoning a market.
Nintendo has discontinued the GameBoy / DS line. Because they now sell the Switch Lite, which is their new way to solve that problem. You can argue "Nintendo sucks, they discontinued their handhelds, we can't trust them on hardware", and they sort-of have. But they gave that product line 10 years of support, and they haven't abandoned those folks, the Switch Lite exists for them now to bridge over to the new mobile gaming market. Not all "discontinuings" are of equivilant weight as Google's product-killings.
Steam doesn't sell a Steam Controller, true. Because much of the Steam Controller stuff now supports nearly any controller (Switch Pro / DualShock 4 / Xbox One XINPUT, including the full accessibility controller / etc). Yeah, it's not quite the same as the Steam Controller (no touchpad joysticks), but they didn't abandon that market. And every Steam Controller ever sold is still fully supported in software, even in new games made this year (6 years after launch).
Steam doesn't sell a Steam Link. But they didn't abandon it, they upgraded it. Steam Link now works on Windows, Mac, Linux, Apple iPhone, iPad, Apple TV, Android TV + Android Phones, Samsung Smart TVs, and such. They don't sell you their own box anymore, because that would be super redundant, most of the TV boxes people already own can run Steam Link already, and they continue to support Steam Link on many different clients to this day. Last time I checked, even original v1 Steam Links are still fully supported in all software + service (6+ years after launch).
---
In comparison, Google often just hard up kills stuff. Google Reader died, replaced by nothing. Android Things died, replaced by nothing. Google Cloud Print died, replaced by nothing. There's an entire website dedicated to just listing random stuff Google's killed - https://killedbygoogle.com/ . At least half of those products or services have no graceful fallover or upgrade path to anything else.
I get that it's a fair comparison. But I strongly believe it's not an equivalent one. As someone who has bought plenty of Google and Valve hardware over the years, I'd be a lot happier with Google as a company if they put even just half the effort on the support and maintenance lifecycle for their products, that Valve already does for nearly everything they touch.