Bar one or two no one deserves any credit for that performance.
LvG said - ""In the last minute of the first half, Ander Herrera could have finished it but he didn’t. I asked him and he didn’t know why." - I haven't seen it but I'd assume he was probably asked about our chances to win the game, arguably that was our best chance because the ball was to feet and he fecked it up - I don't really see that as pointing the finger and I'd say if you're gonna take that comment as some sort of stinging OTT criticism I'd say you're being a bit precious.
As for not commenting on Rooney, I'd imagine he thinks there has been enough comment on Rooney from the press on him, and the last thing he needs, in the context of trying to get Rooney back into any sort of form, is to give the press more fuel for headlines - "Van Gaal lays blame for poor performance with Rooney" - as it's hardly going to be productive.
Aside from anything, fans give far too much credence to what managers say to the press, it's not as if they don't talk to players, and most likely say something completely than they do to the press which is obviously a pain in the arse for them.