The timing had more to do with the story going out via the tabloids. It was a lot better for him to control the conversation than let tabloids - who are always so happy to jump on the back of black footballers - tell the story their own way.
The idea that his coming out about issues he faced somehow is a way of looking for 'excuses' for 'failings' is a seriously demented way of looking at the situation. You apparently think the world just needs to 'toughen up', though you need to back that up with claims about other individuals' experiences, and not your own - what a great position to be in!
Oh well, I doubt any of your friends who have gone through 'much worse' is a millionaire who scored for England in the World Cup, right? 'Failure' is very relative, Dele Alli is a very successful professional footballer and that this has been your reaction to his story says more about you than anyone else.
I'm just glad to see a young man who seems to be enjoying himself again. If he makes it back as a footballer, all the better.