I'm not sure he mentions the 4th place trophy at every opportunity, that's a bit of an exaggeration.
The mental frailty has been a massive issue and Wenger is definitely culpable in that, BUT there are signs that this lot have a bit more steel. We've just won our 4th league game in a row where we've gone behind. I'd trust this lot more in a cup final than last year's team. I guess the end of this season will show something about how mentally strong this lot are, there's a lot to play for and there's a lot of pressure.