It would be a big prejudice to say that they will never improve mate. I agree that it is related to strategy. Mourinho tried to use the same system he used in the Anderlecht matchup. But it didn't work against Rangers at all. Now he needs to change it in the rematch. 
Mourinho is actually a winner manager in European tournaments. He achieved Champions League trophies, won each one of the Europa League and Conference League once as well.
If he is given time maybe he could achieve such trophy with Fenerbahçe too. But for this year, his job looks really difficult.
Mourinho is actually a winner manager in European tournaments. He achieved Champions League trophies, won each one of the Europa League and Conference League once as well.
If he is given time maybe he could achieve such trophy with Fenerbahçe too. But for this year, his job looks really difficult.It was unexpected that we would see Fenerbahce lose so badly in the home match against Rangers. Fenerbahce lost at home by a margin of 3-1. And Fenerbahce lost in this match because of their poor defense. Although Fenerbahce players were able to attack a lot, Mourinho failed to keep his defense strong. And that is why Rangers players were able to score three goals despite attacking very little.
I personally do not think that Fenerbahce has a chance of qualifying for the next round. Rangers defense is strong. Since Rangers are ahead by 2 goals in the first leg, Rangers' main target in the second leg will be not to concede a goal. If Rangers play defensively, it will not be possible for Fenerbahce players to win by a big margin of 3 goals.