Not very hard, it seems. Targets have just walked off and signed for other people without so much as a whimper from Arsenal, and some players that should have been targets have been snapped up. Arsenal haven't lost their best player, for once (a cynical Arsenal supporting friend of mine happily pointed out it's because "we don't have a best player any more") but it's still one of the worst windows for a long while for them.
Exactly. For me main failure in transfer window has been waiting other clubs to make their moves and then only make our own ones. We have enough financial power to make moves happen ourselves and we shouldn't be waiting for others to make the moves for us.