I haven't enjoyed the direction Wow raiding has gone over the years.
In Vanilla raiding was mostly a gear-check. If your raw numbers couldn't crack the boss fight you couldn't beat it. Progress depended on people farming resistance gear and so forth and of course on keeping your players.
Over time and in response to the most vocal raiders this has morphed into a mechanics check. If people stand in the fire you can't kill the boss. The content is gated by the most incompetent person and players have tended not to be gentle with such people.
Over more time this morphed into more and more complex mechanics checks. All bosses have multiple threats and you now have to dodge the fire patches while avoiding the big rolling balls of death while interrupting the Big Spell of Doom on cooldown while dot dot dot.
What players are doing is they're getting ahead on the mechanics on the PTR or by having alts in other raiding guilds so that they can cope. If you're a slow learner regarding such physical tests (and I am) you will stand out as players increasingly adapt so that they're not last. Boss kills depend on mechanics, in fact many bosses can't be killed unless pretty much the whole raid has the mechanics down pat.
I started raiding this time round while my mother was seriously ill in hospital and I had to do a lot of caring and admin tasks for her. She died on 31st January.
I had to stop raiding, there was so much going on in my head that the pastime simply wasn't a leisure activity for me, something to unwind, it was a demanding and difficult activity that I was doing really badly at.
Clearly those circumstances are exceptional but even in normal circumstances raiding has been led to a place which is less than fun for most players.
It's not this particular raid. Battle For Dazar'Alor is one of the best raids I've ever seen and the storyline is fantastic. Fighting in the streets of my home city is amazing, very immersive.
An additional complication is Mythic+. I should have got into Mythic+ months ago but I've been lazy and it's difficult and challenging. As a result the natural method of farming gear outside raids also required me to do homework learning mechanics which I had no capacity for on top of learning the raid mechanics from videos.
I also looked into pvp but that also requires a very specific playstyle, talent spec, addon setup and so on.
So basically I found myself in a place where I didn't want to spend much thought or focus on my game yet the end game options all demanded it.
So after raiding for about 3 nights I've now left my raid guild and am mooching around doing daily quests, AH and alts.
Sometimes the game is just too difficult for the amount of focus one is able to give it.