Obnoxious, boring, generic; that's how I'd succinctly summarise Hell's Paradise. But since there is a word count minimum limit, allow me to break it down for you.
<>Characters:
-The MC is Gabimaru, he has a wife and he is hallow, that's all you need to know.
-The female characters, for the first 10 episodes (aka the whole damn show practically) can be put in two categories: Fanserverice or damsel in distress. Sagiri and Yuzuriha manage to get their shit together in the last 2 episodes though.
-The male characters are very basic shonen tropes; you've got the man-child, the oresama, the sus brothers, the white haired teacher to name a few.
<>Plot:
It's just battle shonen, and a very boring one at that since Gabimaru is covered so tightly with plot armor, the outcome of a fight is decided before it even starts. The villains also possess negative IQ and ramble on and on about secret techniques and freely give out important information, making it even easier for the MC to power up. Side characters get their little bit of screen time and a flashback before they fuck off to the afterlife.
Animation is good just as you'd expect from MAPPA but even that wasn't enough to save this absolute shitshow.
It really stands to show how the anime industry is going to shit if the likes of Jigokuraku is dubbed as the cream of the crop of its season when it's so below average.
So if you are an experienced shonen fan or have a higher IQ than that of a teenager, don't waste your time on this cliche mess.