Why did Britain say “no thanks” to following the treaty of Paris

Britain violated the treaty in a variety of ways, such as by occupying American territory in the Great Lakes region and refusing to return confiscated slaves. ... The treaty recognized Spanish control, but it did not specify borders. This oversight would later cause conflict between Spain and the United Statesn:

president jefferson protested this interference in american trade. he sent james monroe to london to negotiate a treaty. jefferson wanted britain to stop taking sailors from american ships, and to stop interfering in the trade of neutral nations. monroe tried many times to discuss such an agreement. but the british foreign minister was always too busy to see him.

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