You're fucking kidding me, right? I complain about the lack of any world building and campaign setting books, and you refer to some flavor text?
You're complaining that the 5e monster manuals only present monsters as "a bag of hit points," when in fact the presentation is, when compared to past monster manuals, easily good enough to conclude that they're intelligent beings who live in a world with a social structure and a history. Moreover, those setting books & boxes everyone adulates today sold very poorly. Most people didn't have them, so if DMs were better in the 80s and 90s, it couldn't have been due to material nobody was buying. Maybe video games hadn't rotted their brains as badly. If a 12-year-old in 1979 could run more creative game using nothing more than the '77 MM and a dog-eared copy of B/X he got at a yard sale than a fat 38-year-old soybeard in 2024 with decades of content behind him, nearly all of which is now online in various wikis or for sale in PDF form on DTRPG, the problem is not that WotC hasn't published enough text yet. The problem is the DM is just stupid.
And just to compare world-building you get in monster manuals:
1e MM - For background, you've got 5 paragraphs about hell in the section about Devils. It's a nice little write-up. This is the Pit Fiend:
The lowest plane of Hell is the home of the dreaded pit fiend, a devil ofgreat power. They possess a terrible strength and the most evil nature. Allpit fiends have personal names. They are the personal servants ofAsmadeus. Each typically carries an oncus-like weapon and a jaggedtoothed club, and all can strike with both in a melee round.
2e MM - For background, you get about 8 paragraphs about baatezu. It covers a page, but there's a ton of white space. Still more than 1e. This is the Pit Fiend:
Habitat/Society: Pit fiends are the lords of Baator, the baatezu with the greatest power and station. Pit fiends are found throughout Baator, but are very rare on the upper layers and in the frigid cold of Caina, the eighth layer. Pit fiends are very rare on Avernus, Dis, and Minauros. They are rare on phlegethos, Stygia, Malbolge, and Maladomini. In the fearful realm of Nessus, the pit fiends are common.
Wherever they are, pit fiends wield enormous power. They lead legions of dozens of complete armies into battle against the tanar’ri. These huge forces are terrifying to behold, and any non-native of the Lower Planes of less than 10 Hit Dice who sees them flees in panic for 1 to 3 days. Those of 10 Hit Dice and greater must save vs. rod, staff, or wand or flee in panic for 1d12 turns.
It is rumored that pit fiends are not the most powerful beings in Baator, but themselves servants of some greater power. If there are greater beings in Baator, certainly they are powerful enough to hide their presence from mere mortal sages.
Ecology: Pit fiends are spawned from the powerful
gelugons of Baator’s eighth layer. When gelugons are found worthy, they are cast into the Pit of Flame for 1,001 days. They emerge as pit fiends.
3.5 MM - For lore, you get just three short paragraphs about devils. I think it's a few more words than 3.0, but there's not much. As for the Pit Fiend itself?
Pit fiends are the undisputed lords of the baatezu, masters of creating fear in mortals and devils alike. A pit fiend often wraps its wings around itself like a grotesque cloak, and appears wreathed in flames. A pit fiend is 12 feet tall and weighs 800 pounds.
Wow. Talk about your bag of hit points.
4e MM - You get a
full page of background to the Nine Hells and the devils that live there. As for the Pit Fiend itself?
Nobles of the Nine Hells, pit fiends form an elite ruling class that oversees vast numbers of lesser devils. Only the archdevils known as the Lords of the Nine Hells stand higher than the pit fiends.
Each pit fiend is lord of a large domain within one of the layers of the Nine Hells and is vassal to the archdevil who rules that layer. A pit fiend might govern a city, command a fortress, lead a great legion, or server as a seneschal or counselor for an archdevil. With the exception of Asmodeus, each Lord of the Nine commands no more than a dozen or so pit fiends.
As the lords, barons, viziers, and generals of the Nine Hells, pit fiends rarely confront adventurers in person. They are the progenitors of devilish schemes, and they step in only when important plans go awry or when great plots reach fruition. In the Nine Hells proper, pit fiends command vast numbers of lesser devils. Penetrating the defenses of a pit fiend's castle and destroying the mighty devil in its own demesne is a deed of truly epic proportions.
Wait, did the much-maligned 4e MM really just BTFO every Monster Manual before it? It absolutely did.
Now, what's the 5e MM give you? You get a page and a half of background material on devils and the Nine Hells. Of all five core monster manuals, it is arguably the most lore-rich presentation of any of them. 4e's close, though. Then, of course, you have the paragraphs on the pit fiend:
The undisputed lords of most other devils, pit fiendsattend the archdukes and archduchesses of the NineHells and carry out their wishes. These mighty devilsare the generals of the Nine Hells, leading its infernallegions into battle.
With an inflated sense of superiority and entitlement, pit fiends form a grotesque aristocracy in the infernal realm. These domineering and manipulative tyrants conspire to eliminate anything that stands between them and their desires, even as they negotiate the convoluted and dangerous politics of the Nine Hells.
A pit fiend is a hulking monster with a whip-like tail and enormous wings that it wraps around itself like a cloak. Armored scales cover its body, and its fanged maw drips a venom that can lay the mightiest mortal creatures low. Fearless in battle, a pit fiend takes on the most powerful foes in single combat, demonstrating its supremacy and an arrogance that prevents it from acknowledging any chance of defeat.
I didn't quite expect to discover that 4e and 5e present the most lore of any of the monster manuals, and definitely didn't expect to find that my 3rd edition book gives you barely enough hook to hang your hat on. Objectively, though, if we're looking at how the monsters are presented in the core books, 4e and 5e are the
least guilty of presenting naked stat blocks. The worst culprit? 3rd edition, hands down.
If a DM was able to run an engaging campaign out of the 3.5 monster manual with its two-sentence description of the pit fiend, then 4e and 5e really leave you with no excuses.