It's like they were disappointed that so many people turned their backs on their one true messiah Gene Roddenberry.
Even Majel and Rod approved of JJ's film!
BTW, this happened both in 2001 (ENT) and in 2009 (ST XI). History literally repeated itself.
Check out "The Best of Trek". Some fans hated every single change in ST:TMP, too, and many of those were Roddenberry's doing. They wrote extensively about all of their peeves throughout 1980.
Further back, they were also peeved by TAS.