My team is at 93, always training,
This last weak of the season, your team should be at least 100%.
You 're doing something wrong or you 're not doing what it takes.
You can read some threads from Tutotrials nad Guides.
Might helps.

I'm starting to think there's an important algorithm in the game. You don't pay $$ you will get -40 luck for all the matches....
there are some weird algorithms in the game but none is including a real money factor.
Try to understand better the game before spending money on it.