evil dragon is reincarnated revenge begins at the age of five

i once presided over the whole planet as the fabled red dragon. my brethren have been slain by humans for many years, and my desire for vengeance gradually became my sole goal in life. but i was a failure. if there is an afterlife, i would undoubtedly exact revenge on my people. i died with hatred in my heart on the day of the pivotal battle against humans. if there is an afterlife, i will exact bloody retribution from these vile people! i wonder whether there is an afterlife. i was reincarnated as a feeble infant human?