A'ight, I'll make it quick because I'm not that cool guy handing out advices.
1. The difference between paying a 50k guy to play PG and a 3k guy is that both will get smashed, but you'll pay one 47k more than the other. Salary efficiency fundamentals, dear Watson. So now, while I train my crappy 3k guy, I can afford a 47k guy to play in his true position and carry the 3k guy. You can't do that with your 50k guy.
2. Other managers should not have let me train 19yo in d2. They should beat the sh!t out of me and send me back to d3. Instead I was able to train these little fellas while making ways more money than I'd have in d3. They made it easy for me. This had lead my team having a real shot at promoting, something you shouldn't want as an opponent. There are 16 teams, only 1 can promote.
Basics, dude.