you seem to have started playing wow a 1-3 ago so i understand your plight, keep going it will become easier.
if you're not a new player then you must barely play the game so that's understandable as well.
I'll try to provide a bandaid for you...download the addon called HandyNotes: Visions of N'Zoth
Invasions: go to circles, those are zone events that reset daily...and give way more % during invasions, if you do these while doing your daily quests as well it's more than enough to complete the invasion. you have weekly chest location in it...simple chests, elites etc. took me 20min today to finish uldum full, another 20 for vale full.
Few quests are actually tedious, it's mostly us not being used to them.
My only issue with this patch is the rate of reputation gain, it will take alot more than usual to get max reputation.