The France forward signed a five-year contract with the Ligue 1 side last week as part of a deal that saw Rony Lopes move in the opposite direction.
After scoring 38 LaLiga goals during his three seasons with Sevilla, the former Toulouse player had been linked with a move to Spanish champions Barcelona and also Premier League side Manchester United during the close season.
Ben Yedder has instead returned to French football with Monaco – and he is not concerned about last season's successful battle to avoid relegation, insisting Monaco's struggles were an "anomaly".
"It was hard to leave Seville," he said at a press conference on Wednesday. "There was a lot of emotion, a lot of things happened in Spain for me.
"But with the vice-president, [Oleg] Petrov, we exchanged a lot about the project. Monaco wants to be at the top of the table. Monaco is my choice.
"We don't know what would have happened if I had stayed in Spain. There were many clubs that were interested in me. I chose Monaco and I am satisfied.
"It's a big club, although the situation is difficult at the moment. But during the last five seasons, there was a Champions League quarter-final and a semi-final.
"We will make sure that what happened last season is just an anomaly. We will do everything to reach the European competitions."