Time, for the fickle thing it is

Thirty-seven-year old Harry Potter looks back on his life and finds how worse the world has become, thus he goes back in time to save his seven-year-old self from an event that changes his life, to entrust his legacy to himself. May sound cheesy, but a different approach. Minor to major Dumbledore and Weasley bashing. Snape Bashing. Grey Harry, time-travel, A-Universe/A-Reality...