Anyone who has ever watched football knows that when a side thumps another side in the 1st half of a game they rarely continue to do so in the 2nd half. There is a tendency to relax a bit, that is not an Arsenal problem or an Arsene problem or even a football problem. I don't know if it's a problem at all, it's just human nature.
I don't have any stats to hand but I'll bet that if you look up all the games where one team was 3-0 up at half time they rarely ended 6 nill or as real pastings. Obviously it becomes a problem if you do something ridiculous like drop points from that position but we didn't and we really weren't fortunate, let alone 'very' fortunate, to end up winning the game.

Wenger out is a reasonable assessment from the last 2 years (not the last 10, there were financial constraints for much of that time which must be factored in to any assessment) but it's not a reasonable assessment from Saturday's game which is what we're talking about. OK, we get it, you want Wenger out. A lot of us do. But what's the point in posting that after every single game (he's going to be here all season whatever you post) or always looking for the negative in every game, every result, every transfer, every quote?