I mean he clearly is partly to blame. How can you absolve him of any blame when its his man who scored? Not tracking your man when you're theyre hitting you on the break is bad, but to not even bother when you've literally just come on is criminal. If Kenedy bothers to follow his man, there's a good chance they dont score.
You can have a go at players all you want for not having the talent, but to not bother following your man when you've just come on is an absolute disgrace.