The ex-Arsenal midfielder has been reflecting on yet another of his former side's European demises.
During the first leg of the last-16 tie, Merson says, Arsenal should have shut up shop when 2-1 down at Monaco, accepting defeat on the night but taking a wiser approach to the two-fixture contest as a whole.
Instead, the Sky Sports pundit believes the Gunners were influenced by their supporters, who urged them to attack, with Wenger's men eventually conceding one more goal - the very goal that cost them their place in the quarter-finals after winning the second leg 2-0.
“When it was 2-1 in the first leg, instead of shutting up shop and putting it down to one of them days, the fans started shouting ‘attack, attack, attack’,” the 46-year-old told Sky Sports.
“When you look at it now, they are not a very good team Monaco and Arsenal will be disappointed.
“Arsenal lost it in the first leg. No disrespect to Monaco but we can see they are not a very good team. Whoever gets them in the next round will be pleased."
With their focus now fully back onto domestic duties, the north London side will look to extend their Premier League momentum at Newcastle United this Saturday afternoon, before hosting Liverpool and visiting Burnley after the international break.
Then comes an FA Cup semi-final against Reading, as the Gunners aim to defend the only trophy they've won in the last decade at Wembley.