I suppose most presidential administrations have experienced upheaval or controversy, and yes, people have quit or been fired -- but not to the extent of the current administration and not so many in a little more than the first 6 months.
I still say most of the chaos is being orchestrated. Trump became a household name through his reality TV show. Reality TV needs to have manufactured drama to make it interesting. This is what Trump knows how to do. He has to keep his supporters engaged and interested. Otherwise they will move on to some other reality TV show. One thing Trump can't stand is to not be the center of attention.