If I recall correctly the F-15 was partly his baby but he only got in mid-way so couldn't make it as good as he wanted it. Then the Lightweight Fighter program was run by him and generated the YF-16 and YF-17 prototypes. The YF-16 won the competition and became the F-16. Then the Navy didn't like a single engine plane (or didn't like an air force plane) and took the YF-17 and made the F-18.
So I doubt they hated the F-15 but they definitely liked the F-16 better. I'm not sure how happy they were about the F-18 given that it was a run-around their LWF process.