Adam corrupted his own nature. He could have thrown the apple away, and Talked To God right away. You can’t blame just the woman for a sin you joined in on. Both of them sinned. Both of them damned us to original sin. But Adam didn’t have to go with it.
Adam is guilty of choosing to sin, but Eve sinned first, thereby, corrupting his and all of nature. She further seduced him, directly, by convincing him to eat of the apple. He still had free will and chose to sin against God by disobeying Him and following the example Eve.
Adam gets the blame because he had authority over Eve, for she was created from his rib by God. He was, ultimately, responsible for the fall because he lapsed in leadership, which allowed Eve to be navigated by her own faculties and trust in Satan, but Eve was the first person to meet all conditions required to sin, thus, she was the mechanism for the fall of man and nature.