Such as?
Bland areas filled with "bring 20 rat asses" quests that awarded you with tiny portion of experience? Or maybe dungeons located in the middle of nowhere that consisted of nothing but auto-attacking mobs and bosses with 1 or 2 abilities? Or maybe PvP which was literally a carrot on a stick grindfest with only couple of farmed battlegrounds?
What kind of amazing content did they have which was actually a real content and not a thinly veiled daily grind of the same shit in hopes of eventually getting something out of it?
Heck, if you would compare WoD to Vanilla, then it would almost be a joke how empty vanilla really was. You had literally huge areas empty with absolutely nothing interesting in them.
All it had was grind and time sinks in everything you did, so you had this feeling of doing something "meaningful", even if it was just sitting and grinding your ass off in Winterspring for gold or spamming trade for half an hour in hopes of assembling group for a dungeon and then having to get there and sit in it for another hour in hopes nobody bails. PvP was just as bad with things like some AV games lasting for literally days of tug of war and Raids which were propped up but utterly ridiculous corpse runs in most of the cases.
So yeah you could sit in WoW for hours... and in reality those were hours wasted on meaningless shit.