"Were it not for your outstanding leadership of, and close cooperation with, the team, the completion of the unenviable assignment would not have been possible,; much less
itwould it have received the accola tdes that it did from thecolleagues and the general public.
That is possible, though I prefer to start with 'had it not been for...'
I do not like the 'much less would it ...' . More natural for me would be 'and it certainly would not have received...'.
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