Star Trek Nemesis, Star Trek Insurrection, they are the reason that none of the Trek series have any continuity (within themselves of between the series) after Gene Roddenberry left. they're the reason Wil Wheaton (wesley crusher) left Next Generation, as well as the woman who played Tasha Yar in the first season of NG.
They created to mediocre-poor trek series to milk the franchise for what they can, rather than listening to what fans wanted (A large portion of fandom wanted to see Captain Sulu (crew member from the original series) and the adventures of him and his crew). In short they've done alot to earn the hatred of trekkies Something Positive captures the general feel of the respect those two have for the franchise in
this comic