My initial reaction was "it's none of your business", especially since it's you, Trid, and I could just see you responding "Well, if he did/didn't do <x>, he really didn't do it properly".

But I shall answer. He kept the rules, he remained celibate, he went to Mass and confession regularly, he did volunteer work, he prayed. But he was rejected by many, especially in the clergy and by traditionalists, because he was gay. That is unchristian, to reject someone, not because of anything he had done, but because of what he was. Of course, being called "intrinsically disordered" in official documents hurt -- and don't kid yourself, it is homosexuals, not the so-called "homosexual tendency", that is being insulted here.

 The final straw for him was when this ar$ehole of a priest, who knew my brother was homosexual, gave a sermon on how acceptance of gay marriage was the number one sin besetting the US. 

No, as I said, he did not fail the Church, but the institutional Church failed him