I think he is rather miffed that he never got the credit he felt he deserved for the initial work he did - he also lost out on money when the early patents was

I think he is rather miffed that he never got the credit he felt he deserved for the initial work he did - he also lost out on money when the early patents was re-assigned to another company. His words - "They got rich on the products of my mind.” https://www.nature.com/articles/d41586-021-02483-w https://www.nature.com/articles/d41586-021-02483-w