The low voter turnout could reflect the overbearing
nature of some
admins, or even being completely baffled by the template system. Most
people who are affected that way are not likely to stick around to
argue, and they are even less likely to go to some attack site where
they can make fools of themselves. Reasonable and knowledgeable people
have better things to do with their time; they just quietly disappear.
So are reasons why people would leave Wikipedia, not reasons why
active Wikipedians wouldn't vote. The turnout figures are calculated
based on how many active Wikipedians there are (what definition of
active is used, I have no idea).