Why are resolutions so hard to keep?

Likely, because the brain prefers established habits. Only 1 in 5 actually follow through with New Year's resolutions. Non-specific resolutions confuse the brain. "Going to" is future tense. The brain does best with ONE resolution, and will take 12 weeks to turn your resolution into a habit. Don't tell your brain what you are "going to" do. Check out https://allmylinks.com/brainfunctionguru.