Is game random? Hm..
I have 4 teams, wasn't active in the 2nd half of the last seasons - no boosters and skill points added, no 8% BP etc.
Some of them were left with reserves in 1st team (because I usually rotate team).
Results:
Cup won with avg. 4* players (reserves) in 1st team at level 8, same team finished 2nd in league and reached CL 1/4 finals.
CL won at level 3, key players out of team.
1/2 CL finals at level 13.