So this is one of those problems where you have a game that is really damn good, and people play literally all the great story content really fast. So, in the interest of making sure there is at least something to do in the game for those long time loyal players, they make grind content like the Diadem (Heavensward), Eureka (Stormblood), and now Bazja (Shadowbringers).

Other content that fits into this bill is Ultimates, Savage Raiding, Crafting and Gathering, and Housing (assuming you survive the wrath of the RNG god and get a house with the luck of 5000 Pagaga clones).

It is grindy and boring because it has to last long enough for the devs to get out more content before players consume it all. Heck, a lot of time it isn't enough since Hardcore raiders can chew through savage in two weeks and dedicated crafters have penta-melded resources stockpiled because they literally sit there, churning stuff, every minute for hours. Yes, that guy named Bob the Mighty sitting there by the Market Board and summoning bell has spent hours making that stack of HQ Strength Tinctures that you blow through in about 3-4 bad raid nights wiping to an angry laser spewing nightmare.

Bazja had a ton of problems, but it was largely the punishing nature of losing resources on new content. The day DR dropped was like the beach of Normandy, and I'm pretty sure everyone was glad you couldn't LOSE your rank on that one.