You can't, obviously, But same is true for the decisions governments make on behalf of citizens right throughout the world, whether democratically elected or not.
There is a significant difference. In a democracy, leaders are more likely to resign if their decisions do not reflect the will of the majority. Liz Truss is a good example. Carrie Lam would have stepped down immediately after the march on 9 June 2019 if Hong Kong was a functional democracy, and none of the following events would have happened.
You won't get unanimous agreement on any one issue big or small from all 6 million HK ppl anyway so I guess just think of it as you belonging in minority for the issues that are not moving to your favour and decide how you feel abt it first.. :x