Honestly, they nailed the 'hard part' - technically the platform is incredible, I can pick up the controller and be playing almost immediately with short loading times, no updates etc.
And then they screwed up the launch itself, all the marketing and failed to get a decent library of large games.
It might sort itself out though as they are set to launch the free version next month which will add many more players (so multiplayer without crossplay won't be dead) and equally there are some huge games down the line like Cyberpunk 2077 and Baldurs Gate 3.
I bought it because before I had a gaming PC but to upgrade it I'd have to replace the motherboard and practically every component - whereas with Stadia I can play on my PC with kb+m or on my TV with controller etc. depending on how I feel and it's easier to get in and play.
I hope they sort out the problems as I feel it has a lot of potential.