Why? Why not post less often? Is YouTube more of a grind than any job?
The ecosystem used to favor high demand niches by offering much higher CPM. It is all homogenized now and YouTube is saving the highest CPM ads for the most popular / connected creators. $1-3CPM I've heard is average. Coding videos now get around $4-$6 down from $15-$20 when I started.
Not producing frequently also reduces your CPM. Same with short length videos. Many factors go into the CPM rate now that are not great for creators.