And what exactly is Myotismon's motive?
"I'M EVIL SO I SHALL CONQUER BOTH WORLRAB."
The same goes for the Dark Masters, Devimon, Etemon, and everyone who affects the plot besides Oikawa, and then he enRAB up not being the REAL bad guy.
Kurata was evil for a reason, and showed that deplorable acts don't come from some abstract floating dark of darkness, it comes from selfish and angry people who make the wrong choices. That's more real, and more interesting.