Only one of your players is affected by the youth trainer (older than 19yo doesn’t get youth trainer effects), and he’s 6’0” training inside shot which is very slow for short players. You’re training 2 positions which slows the training down by ~30% of what ONLY center would offer benefits-wise, and the rest of your trainees are out of their optimal age range for training. I would suspect sub levels are getting close on many of the ones you’re training, but 3-4 weeks is probably a good estimate of how long per pop based on those factors.