Midfielder Isaac Osbourne believes the quality available at Pittodrie should have been able to deliver a better season for the Dons. They will end the season in the bottom six and could still be on target for seventh place if they beat St Mirren today. Osbourne admits the dressing room is disappointed that Aberdeen did not make more of an impact this time around. Niall McGinn has scored 20 league goals this season while the 14 goals conceded at home hints at a staunch defence that is equalled only by Celtic. However, former manager Craig Brown stepped down and was replaced by Derek McInnes after the side failed to sneak into the top six, conceding a last-minute winner to Dundee United's Rory Boulding in their final game before the split.Osbourne said: "It feels like the one that got away. Considering the squad we have got it's been a disappointing season. But then looking back on last season when we finished ninth, it's been a progression. I suppose we just need to hope we can build on that for next season."Goalkeeping colleague Jamie Langfield considers that a European place could have been possible had it not been for a series of injuries that have blighted the campaign. He said: "We had a full team out at one point this season. They were all guys who would have pushed for a place in this Aberdeen team. When I look back on this season, the likes of Inverness and Motherwell haven't really had any injuries. We have. But we are not going to let that get us down. We will work hard and come back and give it a right go next season."