This volume of Superman stories covers most of 1941. Throughout the collection, I can see Jerry Seigel (and the various ghost writers I believe were helping him out) doing a pretty elaborate dance to mix things up without straying from the basic formula. In some issues, there are giant humans and animals rampaging. In others, there are corrupt carnival workers. In some, there are radioactive super villains. In others, there are scheming talent agents.
At some point, it becomes hard to take many of the stories seriously when some of them are thinly veiled attempts at discussing the real and devastating World War II, which was ongoing as these comics were being released, and others play out like episodes of Scooby Doo with cartoonish villains who go to great lengths to scare people away from the local mine. I could begin to see some of the problems Alan Moore had with these older comics (probably in no small part because I'm currently rereading Watchmen). There is too big of a discrepancy between what could be the catastrophic consequences of war and the petty crimes of small time grifters.
I can also see why these comics eventually steered more toward the super villain rather than sticking with realistic and relatable crimes. Sooner or later, the petty criminals become interchangeable. They often have the same motivations and many of them even wear similar suits and have similar pencil-thin mustaches. Even if the science behind their tactics doesn't make sense, Lex Luthor and the mysterious hooded ghost burglar have personalities that distinguish them from the rest. They bring a little more fun and energy to stories that are otherwise already getting a bit stale.