Businesses forced to slash operations amid Hong Kong’s sweeping social-distancing measures are expressing deep frustration with the size of subsidies included in a new HK$24 billion (US$3.1 billion) relief package that saw a few hard-hit sectors left out entirely.More than HK$3.5 billion of the government’s third round of Covid-19 relief has been earmarked for struggling industries, but cash injections for a number of sectors were less generous than hoped for, particularly for fitness centres,…