I havn't really herd their new album, but I think I understand both sides here. If you have been a loyal fan and loved and supported the band for a long time, then great expectations grow towards the new releases, and if you simply do not find that you like the new music, you'll get really disappointed ringht?
Remember that music is about music, and sometimes your interest grows in a different direction than that of your idol. You shouldn't pretend to love music you don't like, but if you did like preveous releses you shouldn't be saying that the band sucks either.
All bands, or most bands anyway, have good and bad eras and albums.
They play what they want to play, and you listen to what you want to listen to, right?