If Schumi had been driving for Mclaren this year he would have won the title easily, but he wasn't and didnt.

Neither Alonso or Kimi are phenoms like Clark, Stewart, Lauda, Prost and others were. Schumi is the greatest of them all and this year he has also been a gracious loser.
I doubt he bothers with "what IFs" of any F1 season.