Bitter root judgments are when people who are hurt begin to share their hurt in the form of sarcasm so others can join in. (nakedpastor.com)
While there aren't any rules about the types of herbs in bitters (and most brands like to keep their signature brand proprietary), there are a few that are commonly used to achieve that bitter flavor, including cascarilla, a medicinal tree bark; gentian, a super bitter root; and cassia chips, which are related to cinnamon. (mindbodygreen.com)
Even then however, we should remember Hebrews 12:15: «See to it that no one falls short of the grace of God and that no bitter root grows up to cause trouble and defile many.» (relevantmagazine.com)