One thing you can't knock Google for is their refund policy, whereby everyone gets all their money back and gets to keep any hardware, such as the controller, which as TheVision points out, actually makes quite a nice Bluetooth controller for other stuff, and Google didn't have to enable that.
If you look back at the the history of this thread I was initially persuaded to change my mind a bit when the talk about the cool promised unique tech started, like you're watching a video of a game demo on YouTube, you press a button and 10 seconds later you're playing the demo on Stadia, but none of that stuff ever happened.
So all we were left with is a sub-optimal gaming experience, with a limited games catalogue that was also very expensive, and largely comprised of stuff that'd been on existing platforms for months or years anyway. (Plus once details of the pricing structure started to emerge, we were all like, 'Dafuq? No one's going to go for that', again all documented in this thread.)
Also it had loads of technical issues out of the gate, which in fairness Google did get on top of within a few weeks and months, but as the old saying goes, you only get one chance to make a first impression.
It all smacks to me of a big tech company that just didn't really understand the space it was getting into, which is exactly what's happened with Amazon and their forays into the world of videogames.
I mean, sheesh, if you can't make a success of a streaming gaming platform when everyone's stuck in their houses during a global pandemic and it's almost impossible to buy gaming traditional consoles and graphics cards, you know you gone done fucked up.