Mercury rules all forms of communications and mental clarity. When it goes Retrograde, or appears to reverse course in the sky, miscommunication and mental fogginess result. Work often becomes difficult due to short tempers, poor communication, mistakes in editing and general negativity. Personal lives become filled with explosive emotions, lack of patience with each other and a sense of frustration at how slowly things seem to be moving. You're putting in all the effort, but nothing is happening.
It's easy to blame Mercury for this - but it is all within our control.