last year I’ve won nationa cup and national league, and now I’ve lost 2 investment points
why?

Investment points come from national league, national cup and international cup results. I see that last season, in comparison to the previous one, you did better in the national league and cup but you did not participate in any international cups, so you’ve got 0 points from that, probably the reason why in the end you lost 2 points this season.

Cheers