Sven Mislintat believes Arsenal have changed their transfer policy since his departure.
"Last summer there were leadership changes at Arsenal," Mislintat told 11Freunde.
"It had actually been agreed that I would become technical director, so then I would be around the team on a daily basis.
"But the new leadership had their own agenda and other candidates. On top of that, we had different approaches.
"Previously we had a strong systematic approach to transfers, a mixture of watching things live as well as quality data and video analysis, Arsenal actually owns their own data company.
"That meant that we acted independently, we knew about all markets and players in all positions that came into question.
"However, the new leadership work more strongly with what they are offered from clubs or agents through their own networks."