Campbell: Arsenal need to buy experience
Campbell, 35, was adamant the Arsenal dressing room sorely missed some cool, experienced heads to guide the younger members of the team through the troughs of the campaign.
He added: "You need experienced players who have been through all the scenarios in the season. You cannot beat it.
"In certain situations in a season it gets a bit sticky and you just know to focus your mind and get through it.
"There are times when you need a vital win in the league or to get into the FA Cup final. Players on that level who've got that kind of experience behind them - they are so valuable.
"We had a few injuries and suffered for it. At the back-end of the season we needed a few more experienced players on the pitch. It would have been a different end to the season for sure."