Awful.
I'd say it's easy to be angry at a performance like this, cos it's objectively terrible. I mean if there were lots of red forward arrows you could at least say the midfielder is trying the right stuff and failing. But this is a CM who's not even attempting to find the forwards, he's just passing the responsibility onto other players.
However, the moment you expect anything of Elneny you've already made a misstep. This is a guy who wouldn't look out of place playing for Crystal Palace.
I'd be more angry at Xhaka, cos that's a player who does have the ability to pass forwards and find attackers. Whatever his flaws are, we've seen Xhaka be a creator from deep, so when he doesn't do it it's all the more disappointing.
There's an argument (maybe tenuous) to say that the GK, back 4 and front 4 of this Arsenal team are not totally terrible and might even be good enough for top 6 and top 4 down the line. But jesus the two CM's are dire, the sooner Xhaka, Elneny and Ceballos are out of the club the better.