Why are drops still abysmal?

I am stuck in act 3 with my gas arrow ranger. Until the first maps of act 3 the build felt fine, not amazing but good. But halfway through act 3 I have still not seen any upgrades to my gear.

Rares drop super rarely and then It's something absolutely useless for my build. Currency like exalts almost never drop, so I can't craft or buy better gear.

Mobs take too long to kill and so farming just feels tedious and pointless as the drops are bad anyways.

At this point I am ready to give up on the game because it feels frustrating and no fun at all. I followed a build guide, but my gear isn't nearly good enough to put out decent damage. What a shame.

To make the campaign so slow and frustrating is a terrible design choice. Like this I can't even reach endgame. I just don't have hours and hours every day to farm and not get any meaningful drops like GGG was claiming before EA.