>>149443818
In the case of WoW, it starts off slowly. They played their hand too early and in the first two expansions introduced two big, huge lore characters in Illidan the Betrayer and Arthas the Lich King, and had us(at the time) kill them. After that, where do you go? They remade the world, removing old content for new and updated bits without trying to preserve the old stuff. The third expansion introduced a raid finder, so you don't need friends to find raids but could just que for it. This continued into the Chinese Panda expansion where they reworked the talent trees and how raiding worked as a whole, Time Traveling Orcs expansion had such severe content droughts the fan base was leaving by the millions, literally. They pulled out all the stops for the Big Alien Hell Expansion, and then we fight a War, we travel to the spirit world to fight the never before seen or mentioned Lord of the Dead, several lore character were screwed with or fucked over and I don't even know this new one. Dragonland? Don't know, don't care.
WoW keeps retconning lore, screwing with mechanics that worked in the past, changing things to make it PC and friendly(one quest involving a Warlock mind controlling his assistant was downplayed to 'shes pretending she's mine controlled so he doesn't get his feelings hurt' instead of showing his moral grayness), and more.
Doesn't help that people like Blizzard are scummy, greedy gits, that took them ages to implement Vanilla servers... Only to make them update a few expansions behind the current one.
It sucks.