Wambou
Your problem might come from your CD.
Her strength is FE and weakness is ACC, so you start the season with less research in ACC, which is one of the main characteristics to research on.
Apparently you manage your in-season research and strategies well since you manage to be 2nd this season.
I don’t know how fierce is the competition in your league but you tend not to be consistent on every races, you should try to analyse a bit more when you are not in the top 3, to find out whet went wrong on those races.
Another factor might be the suppliers you choose en when you change them, but I cannot have a look on that part...
On a side note, since your driver is fully trained, you don’t need a level 19 doctor, unless you are fast training another driver, that’s a lost of money.
Hope this helps, have fun racing and good luck.
It does thanks.