The Gabon forward was unable to make the grade under the Spaniard, despite helping win the only trophy manager Mikel Arteta has managed to win as Gunners head coach.
Aubameyang stated that Arteta accused him of putting a knife in his back" at one stage.
The now Marseille star told Colinterview: "It was during the covid period and we were playing, I think, Everton.
My season wasn't great, we were struggling in the league and the day before the coach told us: 'Look, it doesn't matter if we win or not, you have a day off. But if you want to leave, you notify yourself before the match because you have to follow the health safety rules.'
"My mother a few months before had a stroke, it was going to be Christmas time so I went to see the coach and I said to him: 'Coach, I'm coming to see you because I'd like to leave, I'm going to go pick up my mother to bring her back for the holidays'. He tells me no problem."