Something similar happened to a costa rican player that signed for Ajax in the late 90s, he had very little education, came from of the most dangerous places in CR then at the age of 18 Ajax paid 5million dollars for him and he received like 1 million from that transfer, he was already making good money as he received a professional contract when he was 17, and because he was so good that team gave him a very good contract for someone of his age.
Off course he was making thousands of dollars in Amsterdam and started to party like crazy, every time he had vacations he used to go to the beaches and close the bars just for his friends and the ladies paying a lot of money, in amsterdam he said he was fucking and drining like crazy, a lot of friends told him to invest money on thing that did not work out and he lost a lot of money. He was almost broke, until a friend of his grandpa started to advise him before it was too late, a few years later he was playing in some obscure leagues but making a decent pay day, then returned to CR played for Saprissa which is the biggest team over here and made some good money then started to jump from an unknown league to another once again but making good money until his finances healed, then came back to CR to play a few years to retire making good money as well.
Luckily he never married a gold digger.
I put my self in their shoes, imagine coming from a poor family, barely getting some basic education and then you get 1 million dollar at the age of 18, making like 25k a month or more(like happen with chelsea academy players), is easy to get crazy.
You know all the fake friends, free party everywhere you go, lots of cash to burn, bitches fighting to ride your dick, all the girls you liked when you were a kid throwing themselves on the bed.
Should be very difficul to keep composure.
I was partying very hard at 18, but i had more education and way less money hahaha, i cannot imagine with a couple of millions$ in my account and unlimited access to pussy.