Jose Mourinho answered the questions of the press and stated that Fenerbahçe is a Europa League team. In my opinion, this statement shows that Fenerbahçe is not inadequate for the Champions League, but since the Champions League is the arena for the most elite teams in Europe, maybe Fenerbahçe's current squad is not up to that level yet.
This kind of statement could have been made both to reduce the pressure on the players and to send a message to the management. Mourinho's words should not be read as an underestimation, but as realism and goal setting. Mourinho has repeatedly emphasized that he didn't come to Fenerbahçe just for the Europa League. But I think Fenerbahçe's priority is to succeed in the Europa League.