The England international scored the only goal of the game as the Gunners beat Premier League champions Chelsea in Sunday's Community Shield clash at Wembley.
But the Emirates Stadium outfit had been criticised in the build-up to the match by Roy Keane, who believed a number of Arsenal players were "more interested in selfies and six-packs" than winning.
However, Oxlade-Chamberlain refutes those claims and feels that every member of the squad is hard-working and looking to help the team towards silverware.
"It’s a new era, isn’t it? Some people do it, some don’t," he said of Keane's selfie criticism. "We’re serious about winning trophies. Personally, and I can speak for the rest of the squad, we’ve been serious every single year I’ve been at the club about winning trophies.
“You can see that on the pitch. A lot of people don’t see when we lose and go through tough times how upset and disappointed we are.
"We’ve always wanted to win trophies and in the last years we’ve won a few. This season we want to go that one better."
Arsene Wenger's side finished third in last season's Premier League but are being tipped by some to be reigning champions Chelsea's nearest challengers when the 2015-16 campaign gets under way on Saturday.
And Oxlade-Chamberlain believes a stable squad means they can challenge right at the top of the table while they will take confidence from beating the Blues in the season's curtain-raiser.
"We’ve all been together a good number of years, we’ve shared two consecutive successes in the FA Cup and we’ve had the highs and the nice feeling from that. That always helps. As a team we’ve suffered some upsets as well and I think we’ve grown from that and learned.
"It was what we needed against a good Chelsea outfit after the season they had last year. It’s important for us to come into these fixtures and lay down good foundations and good markers. I’m glad we did that at Wembley.
"It does help the confidence and that belief and faith going into that next fixture against them. Against any of the teams at the top of the table, that helps but it is a long season and it is very early doors.
"We can’t get too carried away with that but it is a good end to our pre-season which has gone really well."
