Wesley never felt like a real teenager like, say, Jake or Nog. He was this idealized boy-scout/prodigy/miniature adult who (insanely) served on the bridge, hung out with adults all the time, and didn't seem to have any friends his own age.
Recently someone wrote, "Wesley was treated like he was twice his age and acted like he was half his age."
She was more evil than mean though. One can be mean without being evil, and evil without being mean.
Problem is, he never acknowledged his wrongdoings against the Bajorans. (Granted, he was no regular, so he won't count).