The Gabon international linked up with the Gunners on transfer deadline day in January but he couldn't help the club to claim a top-four finish.
After ending 2017-18 in sixth and missing out on Champions League football for a second successive season Wenger decided to call time on his 22-year stint in the dugout.
Aubameyang believes the club had stagnated under the Frenchman, who has since been replaced by Unai Emery, and insists he is excited for the new era to begin.
"Like in the last few seasons, you have to say the reality is the club has stagnated a little bit. Everyone is a little bit excited to see what happens next season," Aubameyang said on French radio station RMC.
"It's certainly strange that the coach is leaving after 22 years. That's life, you have to move forward. We need everyone to think that we have to work hard to rival the best."