Hataraku Maou-sama 20 read:

I can't believe how empty this book was.  Over 200 pages and nothing of interest was said or done.  Things happened, sure, but capriciously, without deliberation, so to no one's credit.  Nothing admirable happened.  Likewise, nothing dishonorable occurred either.  There was nothing to root for or against in this book, because there was nothing there.

Endless inane discussions like where the pots and plates could be found and what people liked in their miso soup.  Endless veiled and secretive talk that amounts to nothing because the author refuses to come clean and explain what's going on.  And endless repetition of things we've already heard before -- like Alas Ramus likes Satan, or Emeralda doesn't like Satan, or Chiho loves Satan, or Emilia doesn't love Satan -- that doesn't move the plot forward one inch.  There is zero reason to repeat a datum of information that was already revealed in previous books, only bother to mention the issue when there's a change in the data.  This isn't rocket science, it's called not wasting the reader's time.

At the end of the book, magically, a deceptive light show convinces Ente Isla to cease squabbling over territory.  That's essentially all that happened.  This book could have been skipped and the reader wouldn't even notice.

Luckily this tactic to draw things out and delay for the sake of additional sales can't proceed any further.  Volume 21 of Hataraku is the final volume, so all the problems that have been allowed to fester will have to be solved now.  Hataraku must solve who Satan gets with romantically, whether he gets a good job on Earth, whether they defeat the angels, whether Ente Isla and demons can survive without magic, whether the Sephirah are freed/healed, and I guess whether some side characters end up happy or sad.  Volume 21 will have the answers to all the questions because being the final volume signifies delivering the answers to all unanswered questions posed throughout the series.  As such I'm sure volume 21 will be great, unlike the previous ten volumes or so have been.  It can no longer do nothing and punt things down the road.

Maybe it will even get translated before year's end?  Hopefully.  I want to put this series behind me.

I feel like more happens in a single page of '100 Waifus' than entire volumes of Hataraku Maou-sama.  When I write something, it's to inform people of new things that have never happened or been said before.  Nor do I write about stupid stuff like 'I fumbled around in the dark until my hand found the light switch and then I flipped the switch.  I went to the fridge and poured a cup of milk, then put the cap of the milk back on and put it back in the fridge.  Then I closed the fridge door.  Once I finished the cup of milk I washed it out in the sink and put the cup in the dishwasher.  Then I turned the light back off and went back to bed.'

There is no reason to ever write about mundane things that anyone would do in the same position, you can skip it all and let the reader fill the details in with their imagination.  Don't belittle the reader by insisting on narrating everything.  The only reason you should ever be especially attentive to detail is if it betrays a person's complex emotional state in a better manner than saying, "I felt happy/mad/sad."  But I assure you no one in Hataraku was feeling much of anything while all these pointless descriptions were going down.  It was description for description's sake.

Describing people's emotions is always the most interesting subject and any good book would devote as much time to it as humanly possible.  '100 Waifus' is crammed full of people's most passionate, strongest, and most beautiful emotions at all times.  The emotional density.  A page of '100 Waifus' weighs more than a book of Hataraku due to density.

It's really sad when you're reading a new book from a series which is in your great books hall of fame, so better than anything else on offer from mankind, and you're wishing you were reading '100 Waifus' for the 30th time instead. . .