I do watch the games. And I can easily recall quite a few very easy, stoppable shots that Grubauer gaffed.
Every team makes mistakes. The goalie's job is to stop the puck when that happens. Yeah, I saw that Wilson goal. It's definitely a big mistake from the Settle defenseman, but again, that is a stoppable shot - right-hander on the right-side, no traffic. On that play, Grubauer actually anticipates it happening and has time to get set. He just gets beat. It seems like every chance like that, he's getting beat. Good goaltenders are gonna stop some of those.
I definitely think there are flaws with xG models, being there are variables (like pre-shot movement) that we don't have data for. If we had access to a model like SportLogiq, I don't think Grubauer would look as bad by their numbers. But there is no getting around Seattle's goaltending performance. It hasn't been good and has been the team's biggest weakness thus far.