While the people cynically questioned God’s justice and longed for his intervention, in Malachi 2:17-3:5, God told them he would be coming in judgment after his messenger prepared the way. In the New Testament, we learn who that messenger was and what God did when he showed up, which was a shock to all.
The LORD uses leaders to deal with threats to the welfare of his people, and he is the God who delivers them.
Christians need to learn to speak with joy, listen with discernment, and grow in grace.
God has always been with his people, in various ways and temporarily in Old Testament times and later and permanently in human flesh.