2) The fact that he is one of the most accomplished mathematicians alive does not contradict the fact that it doesn't have anything to do with him doing politics, and that he doesn't do politics the way we could expect a member of academia would. That's what I meant: since he does not seem interested in research and higher education as a politician, it doesn't really count, on the politics side, that he is a member of academia.
The fact that Villani did not say anything about it and even supported the change says a lot of things on how he is now a politician and his mathematical background does not count anymore. I don't know of a single person with basic knowledge of algorithm who wouldn't be horrified by the design decisions in Parcoursup.
1.) You don't provide any example how he damaged academia. It lacks substance.
2.) "he doesn't care at all about being a mathematician (well, except when it gives him credit he doesn't deserve)" That bit of character assassination is unnecessary. He is obviously one of the most accomplished Mathematicians alive.