A unique prophecy book, the Prophet Habakkuk complains to God, getting God's attention why Judah was suffering under the Assyrians & how God would use Babylon (Chaldea) to punish Judah & Assyria. The struggle of Habakkuk- Why God is not doing something about the sufferings around us is a question asked, over and over again.
Most of us have this in mind, we are too polite to ask God & feel it's not right to question Him. But when we read Habakkuk, we realize, God allows this- God put it down, just like Lamentations. God wants us to process our feelings & emotions not suppress it. If you have questions-check your Bible, you’ll find the reasons, but if you can't - ask God directly. That's the beauty of us as Christians. We have a personal relationship with God, when we don't understand why, we can come humbly, reverently, & boldly to our Abba Father - that's the balance.
What do we learn? Kingdoms come & go but God delivers His people. If we look back on how God has been good to us-in the midst of fear, even if everything was taken from us, when you just have enough to stand for 1 leg & you thought you'll die - you know that God is on the throne -God has a plan. He remembers His own, Rest in Him.