If you say so i guess. You just not liking WoW doesnt mean it failed seeing as it still seems to be doing just fine.
Um...doing fine? No. I take it you havent been keeping up on current events....

Wow taking inspiration from deep dungeons got it torghast which is some of the most fun ive had in that game in a while. If SE could take some things from blizz and put that FF spin to it I think it would turn out pretty great.
They took PoTD and HoH, turned it into MANDATORY content, and has been one of the most contentious, most complained about and one of the worst failures of Shadowlands.

From the WOW forums

No, because they locked legendaries behind it. Well knowing that not everybody would be happy with the repetitive nature of it. That and it should’ve been entirely optional, but optional content just isn’t a thing in WoW apparently.
PoTD and HoH are OPTIONAL, not part of a daily list of chores.

it was fun the first 3 times. Then it was just another chore to check off the list