Why is farming like no money per hour

IGN:crimson_elk I have a fairly maxed setup but it only makes like 16/mil and hour tops which I get it’s semi afk most of the time but it still should be more as I’m getting into more late mid game stuff I’m starting to realize that it’s not really that much any more and would like to start mining but what should I go for to start that most guides suck on YouTube and aren’t really clear or what are other better money methods in the meantime so I can possibly get 655 and divan when hotm 6 in awhile or just better non mining methods