Rashi on Bereishis 25:30 states that Hashem shortened Avraham's life by 5 years (180->175) in order that he shouldn't see Eisav, his grandson acting wickedly ('Tarbut Ra-ah').
And on that day, Abraham died, lest he see Esau, his grandson, falling into bad ways, for that would not be the “good old age” that the Holy One, blessed be He, had promised him. Therefore, the Holy One, blessed be He, shortened his life by five years, for Isaac lived one hundred and eighty years, and this one (Abraham) [lived] one hundred and seventy-five years
However, Rashi states on Bereishis 25:27 states that from the age of 13 it was clear that Eisav went into bad ways
And the youths grew up, and Esau was: As long as they were small, they were not recognizable through their deeds, and no one scrutinized them to determine their characters. As soon as they became thirteen years **old, this one parted to the houses of study, and that one parted to idol worship. — [From Gen. Rabbah 63:10; Tanchuma, Ki Theze 4]
So how old were Yaakov and Eisav when Avraham passed away? 15 !!
(Avraham was 100 when Yitchak was born,Yitzchak was 60 when Yaakov and Eisav were born...100+60+15 =175)
So did Eisav behave wickedly at the age of 13 or 15?