China’s entrepreneur class is grappling with the worst economic slump in decades as the government’s zero Covid policy has shut down cities and kept would-be customers at home. Yet they can’t seem to agree on how loudly they should complain — or even whether they should at all. A tech entrepreneur wrote in a big group chat in May that many members were too critical. “What people here do every day is criticizing the government and the system,” she wrote. “I can’t see any entrepreneurship in this.” A top venture capitalist told his nearly nine million social media followers that…