Dumbledore question

[James Lyon]

No: HPFGUIDX 162261

If one considers that DD had a plan or great wisdom or real affection  
for Harry, here are my questions:
1) Why didn't DD give Harry some battle training over the last 6 years?
2) Why didn't DD ever tell Harry how he destroyed the ring horcrux?
3) Did DD ever let the OotP know that Harry is the one that has to vanquish Moldie?
4) Why would DD want Harry to go back to the Dursley's? Will those few weeks keep the protection up for another year or will the protection fall on 31 Sept, leaving Harry and the Dursley's at the mercy of the DEs.
5) Why didn't DD insist that the DA continue?

James