I have several disagreements with the presented points of view, both for Ravenloft and AoT.
- The Military Brigade are a faaar cry from the Talons and they are not monstrous like the Kargat. Sure they have their bullies and some corruption but nothing that approaches the brutality of the Talons.
I don't know how far you are in the anime, so I won't go into too much detail, because
there are some Kargat throwbacks later in the show. Much later.
- Life inside the walls was actually not bad. It was not a daily grind and it was very safe. The walls enclose an area
about the size of Texas. There was stability. The reason so many had to be expelled after Wall Maria fell was because it would take time to bring up food production to feed them - and because story trumps realism.
Even after the fall, the size of the human lands inside Wall Rose was about as big as Sweden.
There was no struggle to stay fed or alive before the fall nor two years after the fall.
(In short, Eren's 'we are trapped inside our cage' is his own skewed perception and nobody takes him seriously... because he's dead wrong. Their "cage" is large enough that you would need years of travelling to see every forest, mountain or village).
- The people in Attack of Titan are not at the business end of the food chain.
For 102 years Titans have been kept at bay and it was very rare for someone to die by titan - except the scouts. Aside of the scouts and the Garrison of Wall Maria most people have never even seen a Titan, which is why you see them freezing and panicking when they do. Even the 'veteran' garrison that show up to defend Trotsk go "Oh, that's how a Titan looks like?"
- The people in Ravenloft, except Verbek, the new Valachan and a couple more domains are not at the business end of the food chain, they are mostly safe from big monster attacks.
It is the exception that someone dies to monsters in most domains of Ravenloft, not the rule and it is what makes it so shocking and horrific when it happens.