Fenerbahce are not like the team managed by Mourinho now, over time it will all come down to the fact that he will strengthen the defense, this will affect the team's attack, but for some reason it seems to me that this will not work in the Turkish championship, and as you said, losing 5 points in 6 rounds is too much, and Galatasaray is going without losses, and Besiktas can already bypass them if they win their game. Not the best prospects for the team, it is obvious that the hope was on Mourinho's authority, but his recent results show that his strategy is becoming outdated.
Mourinho has gotten pass his prime so it will be very safe to drop down on the expectations placed around him because he's definitely not goin to really do much better but look for situations where his strategy still fits in and take full advantage of the situation at the end of the day. He before now for his strategy and how effective it has been over the years and how much he has been able to achieve with the strategy, i even think he is gradually getting to a retriable age and should consider that as his prowess is beginning to fail.
Although in the Turkish league standings Fenerbahce is in second place under Galatasaray, I think it is still a fine result because after all, basically Fenerbahce is not a team that is always at the top of the table. But indeed, because Fenerbahce has a great manager like Mourinho then it should be Mourinho to be able to make Fenerbahce have good results there, and not just be a shadow of Galatasaray.
But perhaps, Mourinho also still needs time and process which of course, to get a success will not be achieved in a short time. But with that too, it looks like Fenerbahce's chance in the Europa League will also not be easy at all.But, if for example Fenerbahce managed to qualify for the knockout phase later, then I think it would have been a good result too, because this season is also Mourinho's first season at Fenerbahce.