Having read the debut issue in various reprints over the years, I always wondered why the Hulk comic was cancelled so quickly just a mere 6 issues in, especially at a time when the modern Silver Age wave of Marvel superheroes was exploding.
Now I know.
For while Lee, Kirby, and Ditko were spinning out plenty of gold in The Fantastic Four, Spider-Man, Thor (via Journey Into Mystery), and a few others, they really didn't have a grasp on the Hulk title and what to make of it, or him. After a compelling debut issue they run the Hulk into a series of generic space aliens leftover from their Strange Tales days, such as "The Toad Men from Outer Space!" (Yes, that's how they announce their arrival, they're the Toad Men from outer space. That's like someone asking you where you're from and you responding "not your house.")
Or if it's not generic space aliens, it's generic, scheming commies, both of the Russian and Asian varieties. The only enemy of interest in these six issues and who would stick around in the Marvel universe to become any sort of player is Tyrannus, a mad Roman emperor banished underground by Merlin the Wizard or some such. Now, how he just walks out of this subterranean banishment to pretend to be an archeologist and trick poor, stupid Betty into leading him to the Hulk is, uh, well it's one of about a billion plot holes in these six issues. My favorite one is in the climax of issue 6 when the Hulk is fighting The Metal Master in Washington D.C., and General Ross about 1000 miles away just has to be there because of his obsession with the Hulk, and he does arrive basically in an instant, which Stan handwaves away as saying his plane was really fast!
Speaking of Betty, she takes a top spot in Stan's "can't write women" hall of fame, as she's basically in a sweaty, teary panic over Bruce every single time she's on the page.
I could go on and on shooting this green (but first blue, and then grey) skinned fish in a barrel, but the fact this series was cancelled in just 6 issues while the comic reading public couldn't get enough Marvel superheroes at the time tells you all you need to know. And again, the first issue was actually good. The rest is just amusing.