Arsenal are in danger of missing out on European football entirely for the first time in 25 years as they currently lie 10th on the Premier League table with four games of the season remaining.
The Gunners exited the Europa League at the semi-final stage to Villarreal on Thursday after they failed to overturn a 2-1 deficit from the first leg in Spain.
Arsenal have already exited the FA Cup at the fourth round stage to Southampton and were knocked out of the Carabao Cup by Manchester City in the quarterfinals, meaning they will end the season without a trophy to show for their efforts.
It caps a miserable campaign for Arsenal, with pressure mounting on manager Mikel Arteta and Aubameyang not firing on all cylinders as usual.
"We struggled to find our rhythm in the first half and didn’t give Villarreal enough problems," Aubameyang wrote in the Gunners' official matchday programme ahead of a Premier League meeting with West Brom on Sunday.
"And when we had a chance, the luck wasn’t there for us, when I hit the post with the volley and then the header in the second half.
"I thought we started the second half with more energy and put them under pressure, but we just couldn’t maintain that drive and ultimately, we just didn’t find a way through Villarreal.
"I thought my header was in when it hit the post but it just wasn’t going to happen. Like I said, we are really upset about going out of the competition at this stage, for ourselves, for the club and most of all for you the supporters.
"It’s been such a difficult season for fans and we desperately wanted to give you something positive this season – I’m just so sorry we couldn’t do it for you."
Aubameyang has scored 15 goals in 36 appearances for Arsenal this season.
