Nelsons fairly lowly origins made him something of an outsider amongst the upper crust other officers with whom he had to work,
the bulk of these got their positions by reason of who they knew rather than their skills as officers.
His individual take on tactics which gave him an advantage particularly at Trafalgar, was seen by his bosses at the Admiralty as going against established naval practice, and not quite playing by the rules all of which caused a certain amount of friction with their lordships at the top !!