What steps can you take to understand why you have certain habits, like vocalizing during negative thoughts, and decide if they're worth changing?

From a scientific perspective, what's the most compelling 'experiment' that humanity has continuously run since the story of Adam and Eve to understand human nature?
Do MAGA voters have enough conscience to ask questions such as ''How is this making America great again?'' or ''Are we the baddies?''
Why do emotions feel overwhelming when ignored?