Blue Devil
You are as you say "perplexed at the lack of unsolicited interest".
Two things here
01-- solicited interest, return to your letters emails etc, can just be a response to that which you sent .
02-- perhaps after the showcases et al you get no interest because the player does not interest those that have seen him--keep in mind that regardless of what the rankings say the schools that have seen him have to like him and even more importanly need to have a need for his position to be filled
You sound like an angry father who is hitting the wall of reality in the process