When Harry woke up, he was no longer a savior and had no burden on him. He also had his father, James, mother, Lily, and a brother, Harvey, who had never appeared in his memory. But it seemed that his family valued his brother more, because his so-called family left him there the night Voldemort arrived. And because Dumbledore didn't tell him what he originally needed to know and he woke up dissatisfied this time... He decided to work with Voldemort to suppress Dumbledore's inevitable momentum.
Warning: Not black or white, just prejudice and dissatisfaction! I do not know why Harry came to the history, but he is coming
Disclaimer: They all belong to J. K. Rowling, not me