It wasn't even just laggy, it was inconsistently laggy. It already sucks enough to try and line up a shot with normal localized lag, like from an early HDTV or something, but there are just so many layers your game had to go through that things got unavoidably messy. Whomever had to work towards mitigating all of that, God bless your soul, because you did about the best possible job on solving a literally impossible task.
I'll go as far as to even argue against that, because even smartphones can handle just about any digital board game now, and a perk of Stadia was that you could run games your machine couldn't handle on its own. Plus, like, even menu lag sucks. It feels gross to tap through a menu on a D-pad and have everything happening like a half-second behind, and it really sucks when you accidentally click something you didn't mean to, and can't go back.
Yeah, and all of that kinda shit really goes to show they had no clue what they're doing. They really did treat it exactly like Netflix.