Re: Tuvok: the only adult on Voyager
He also showed poor diplomatic skills when it came to dealing with Neelix. Nobody really liked Neelix when he first joined the crew but Janeway, yet they all were polite to him except Tuvok. Not very mature.
I don't remember Tuvok being rude to him intentionally. He just didn't care for his company and sometimes became annoyed with Neelix...which is understandable.
After a time, you may find that having is not so pleasing a thing after all as wanting. It is not logical, but it is often true. - Spock