Do you blame the narrator for doodle's death?

I don't think the narrator was malicious but I do think that he let his pride and determination cloud his judgment. He wanted to make Doodle into somebody he was not.

Yes I think so. At least partially. He did not have the intention of killing his brother. But he did willing ignore his brother's calls for help as well as his limitations. And for this, I do see the brother as guilty. In court, I'd call it manslaughter.

no the narrator is not to blame for doodles death because yes he did push doodle but we can also blame doodle for his own death because doodle never told his parents that his brother was pushing him to hard an brother never admit to pushing doodle to hard.