McDavid has the second lowest 5vs5 goals against per 60 among all Oilers this year.
Spector is pissed off that the Yzerman moment he preached about happened and did jack shit to help the squad because hockey is a team game with 20 players, a coaching staff and a general manager, not something driven by bullshit narratives about great leaders sacrificing their points for defence or whatever is the popular story. It happened without fulfilling its narrative purpose and in Spectors world of childish stories that means it didn't happen at all.
So...
I'm very curious about this second lowest GA 5v5 stat. That doesn't seem possible and if it is, I believe you it's just surprising, I can't help but feel that is still not a good thing. More a the team around him is failing than McDavid is playing great 2 way hockey right now.
McDavid gets too many minutes. This is known imo and often for being so fast is the late man back on too many GA. Draisaitl the same lately although I typically have him the much more reposcible center in that regard.
Too many minutes is on the coach, hopefully. Systems and freedoms of stars ditto. Goalies and defense on the GM...
Any which way McDavid should not be singled out but I think he has to share the blame and work to get better. I also think he does this as well.
In short I can easily see where Spector is coming from but he is twisting it in a very stupid way. As you mention probably because he is pissy ironically enough.