I'm pretty much in the same boat here. I think the rewards are fine it's the gameplay itself in raids. I, myself, do not find raids to be all that fun anymore.
First off it requires way too much time out of my day. You could spend like 5 hours in a single raid and to me that is a total, HUGE waste of time that could've been spent doing other things in the game or outside of it. Also the fact that you're with people you don't know makes it even worse. I just do not have the patience to sit in one raid all day with a bunch of anti-social douchebags who don't respond to you until you make a simple mistake. This is why I and many other people love LFR.
Second, raids these days feel like they just consist of a huge amount of mobs with bosses scattered around. Maybe that's how they've always been but since there's no use for CC anymore it just makes for a very draining and boring time. It's always the same grab as many mobs as you can and kill them all. There's no preparation or strategy anymore which is what made those kind of instances fun.
I don't know about other people but I feel absolutely exhausted after a single raid and I often feel like not playing anymore. It honestly burns me out faster than anything else in the game.