Well, we all have faced at some point what you are getting through presently. I have every second season a potential treble winning side. And I lost it most of the times. But now, I know it is possible to win it. And potentially, in a season you do not expect it very much. There are tons of people who experienced what you did. Once I had a team 2 stars above the rest and I won 2 games out of the first ten in league. Before starting a 16 game winning streak without changing a thing and I won the league by 14 pts. Take it with philosophy. This week-end, I did not play at all and won all my games, without training bonus, without win bonus, without coaching, without replacing my injured or booked players. I think my opponent must be mad at this. But it also happened to me the other way round !
Maybe Nordeus do not like "perfect" teams with everything at max. I always keep a couple of players on average morale. Just to make sure. And very rarely put my win bonus at max (only for 1/2 or finals in cups).