It's endemic unfortunately. When he was at Brighton aged 7, the other parents wouldn't talk to me, and even worse told their kids not to pass to my boy in case he took their place on the team.
Back then, (four years ago) players were signed on season or half season contracts (no money involved, because if they were released that next club would have to pay up that contract before they could play).
It's even tougher now. Due to the pandemic, no recruitment took place at any youth level for two years meaning that all academies everywhere were massively short on players. Now at Brighton they use a rolling four week contract. If you are good for the four weeks you get another four weeks. If not, you're binned out and another kid is bought in.
That's too much pressure for a kid. Imagine being injured for two weeks, come back and are a bit cautious for week three and do OK on week four. You're out.