Poincaré was said to not acknowleged the «french school of mathematics» as the origin of his discoveries. And the institution especially the elite called «ENS» (forming the best teacher for university) is said to have been quite disliking his attitude.
Since Poincaré was heavily relying on geometry, it is said that since they found it unacademic they decided to change the content of math learning to avoid new «casses burnes» mathematicians.
It is very funny at this title to look at the discrepancy between the story of Mandelbrot experience whether it is written in french or english.
French biography states mandelbrot LOVED polytechnic school (another super ivy league) and english said the opposite stating that mandelbrot reproved the lack of use of geometry.
To be honest, I don't know if this is true.