primarily because people ***** about it all the time and unjustly so, considering the high quality other IP's their choosing to spend their time on i applaud their efforts.
Impatience is not a good quality to have in an individual and people vocalise said impatience compounds the situation, not wanting to wait for something is fine, but bitching about something all the time that can easily be put on the back burner is both immature and irritating.
As Cobb said in Incept " see i believe positive emotion trump negative emotions every time" (or words to that effect), and that can be applied to any aspect of life, Instead of anger, why not hope for something else you know is coming out, or get excited for that.