You are rushing things my friend. Give the kids a chance to adjust. It takes time - lots of it. You are focused on the situation so much that you notice things that went unnoticed before. Don't dwell on it and don't beat yourself up.
And you take time too. Ask me how I know what #2 parent feels like. It sucks, but you adapt. Single parenting is a new skill. Give it time.
And feel those emotions: remember our discussions of how feeling emotions make you whole? Feeling the sadness, the sorrow, fear and anger. Letting go of the resentment, blame, indifference, guilt, insecurity, hopelessness, and jealousy. It all takes time.
Give it time. Things will settle down. Ask me how I know that too.