I think your missunderstanding why people are upset.
We alrdy had 2 relic grinds previously so people knew it was going to be grindy, but during ARR and HW those grinds had options, if you were light grinding you could choose different types of content from dungeons to trials to raids heck even fates to collect it.
I would have no problem grinding for the relic for years to come aslong as the grinding had options and was actually enjoyable but this is about as mind numbing as its going to get cause the only options we have is standing still killing mobs over and over.
And sure some people may enjoy it right now, but thats cause they have been doing it for a few hours, compare this to 40, 50 or 100 hours down the road.