Why V.Kramnik arises as a best however V.Anand struggle to breakthrough?

Kasparov has a daughter named Polina and that never stopped him.
Stop calling Polina that & why should she stop him?
Sorry, sudden memories of the movie 'airplane' ...

Perhaps. The last report of his rising like a phoenix did not end well ...
https://www.google.com.sg/amp/www.hindustantimes.com/other/world-chess-championship-anand-the-phoenix-has-risen-again/story-y2KtAeTU5Wc01SgBc3TIOP_amp.html