I agree that there are many things Fisher got wrong (eugenics, tobacco lobbying, etc.), but his contributions to statistics (e.g., maximum likelihood or ANOVA) and genetics are among the most fundamental of the 20th century.

And it's all well-documented. And it's not all that damning. Here's a pretty comprehensive article about it: https://www.nature.com/articles/s41437-020-00394-6. It ends with a well chosen quote from Fisher:

“More attention to the History of Science is needed, as much by scientists as by historians, and especially by biologists, and this should mean a deliberate attempt to understand the thoughts of the great masters of the past, to see in what circumstances or intellectual milieu their ideas were formed, where they took the wrong turning track or stopped short of the right”