De Gaulle was a proud Frenchman and I think he wanted to make the liberation of his country seem as French (and Gaullist) as possible to restore French pride after the embarrassment of 1940 as well as advancing his own political career.
Certainly a difficult man to deal with - not I suspect Winston's best friend
BBC News | UK POLITICS | Churchill 'wanted to abandon de Gaulle'
However de Gaulle's son wrote :-
M. de Gaulle says: "I can assure you I never heard my father denigrate Churchill during the war or afterwards. Yet I lived in Britain at the time when he had plenty of reasons for doing so ...""
De Gaulle admired the British and Churchill, claims his son - Europe, World - The Independent
Regards
Richie