Vulcans being evil, manipulative or just plain condescending pricks isn't really just an Enterprise/nuTrek thing... didn't DS9 have a literal Vulcan serial killer in one episode? ...
Serial killing would definitely be an outlier and is an abnormal state with a variety of potential causes. Again, no one is saying Vulcans are perfect. Even Spock was seen as "dick-ish" by Dr. McCoy from time to time. Again condescension is way removed and in no way equivalent to being evil and manipulative.