Why are the animations so bad?

@Leon888 You say I think wrong, but from my perspective, what I said was rather accurate. Hell's Paradise's animation wasn't a sakugafest comparable with titans like aforementioned earlier in this thread JJK Season 1, but it really looked better than average seasonal anime. You say it doesn't take much to achieve this, but yet, we can easily notice the difference between quality of "regular seasonal anime" and shows than present higher quality than them.

@Adnash It really didn't. At all. Jigokuraku had plenty of cases of stiff animation, constantly off-model characters and blatant coloring/editing errors.

@Leon888 You say I think wrong, but from my perspective, what I said was rather accurate. Hell's Paradise's animation wasn't a sakugafest comparable with titans like aforementioned earlier in this thread JJK Season 1, but it really looked better than average seasonal anime. You say it doesn't take much to achieve this, but yet, we can easily notice the difference between quality of "regular seasonal anime" and shows than present higher quality than them.

@Adnash I don't agree, just look at Sakugaboru too, there are only a few really well animated cuts in hell's paradise, the rest was just saving money and that's it. Mappa has disappointed expectations once again, this anime should have been animated by A1 pictures or Ufotable

@Oongbuh It had few underwhelmingly done elements here or there, I don't deny it. But still, in my opinion, its animation was better than average seasonal anime's.

Also, remember we are talking about animation, not art style or visuals in general. Half of things you've mentioned in your post had more to do with art inconsistencies than with animation itself.

@Adnash here is an example https://twitter.com/Nakayasee/status/1708159642264604791 and that is common through out the show

@deg Yup, more than art inconsistency than actual animation. Plus that kind of scenes appearing from time to time is not something that'd justify calling any animated series as "shit" (I'm referring to the comment from the link you've posted). Underwhelming? Yeah. Wacky? Sure, that's not a bad way to word it. But "shit"? Some people must be spoiled with seeing only really well animated series to freely go with such harsh words. I saw quite a lot of animations in my life and trust me, Jigokuraku's animation is nowhere close to the worst examples of anime I happened to watch. ;D

Fuck off lmao. You don't even have a inch bit of knowledge about animation. JJK S2 and CSM has the bets animation among all MAPPA Animes. JJK S1 is not even close to JJK 2.

Also Hell's Paradise had bad schedule and also it wasn't as big as JJK.

The animation was not bad to say but there were some moments which really irked me like the way Gabimaru's neck is drawn in this scene.

its animation is very good u just watch to much demon Slayer shit.

Maybe try to get a new pair of eyes… the community is worse and worse every day

Short answer: Because MAPPA's producing too many shows

Long answer: (I really recommend you watch the video linked at the end)
So MAPPA has 3 major productions pipelines
The Seshimo team under Animation producer Seshimo Keisuke, who basically runs an insanely talented team of animators. They're currently handling JJK and Chainsaw Man on a b2b basis
The Attack on Titan pipeline under Wataru Kawagoe who are basically sweating their balls off producing Attack on Titan with a terrible schedule, although it's sort of under control now
The low priority pipeline under Animation producer Takahiro Ogawa which handles stuff like Tondemo skill and Dance Dance Danseur, although they do look good.

Here comes Jigokuraku. MAPPA literally didn't have any real animation teams to work on the show, no main action animator or anyone solid that could lift the show up from its grave. And hence it became a lifeless adaptation riddled with production meltdowns and yet somehow didn't get delayed at all.
So the extended answer is MAPPA literally had all their production pipelines filled and couldn't find any new animators to work on the show, add to that a very bad schedule and we get an extremely inconsistent animation.
But although that was the case with ANIMATION, the actual animation directors and show directors were very talented people, including the main director (I forgot her name)
So yeah basically no more fuel to run

watch this video for an in depth dive into the animation production of MAPPA over 2020-2023:
https://youtu.be/E4jtUEQIA6I?si=Rp_MKXshtDuaKcHR

It's "bad" by MAPPA standards, but it's average or above average in my overall assessment. You can say they didn't prioritize this show among their vast ongoing portfolio i.e. it's done dirty.

@Bubax Rich coming from someone who watched *everything* Kimetsu no Yaiba related
Meanwhile I haven't even finished the first season

but I'm sure you know what you're talking about, seeing how you watched all that Demon Slayer shit you've mentioned