So he's got a couple of revenge targets, some not justified. His family was unnecessarily vicious about kicking him out, though I do believe it was the right choice as these families are the defenders of humanity and spending time to train a useless kid and throwing him into world-class levels of danger is dumb. The adventure guild is 10000% in the right, the fucker of an MC stayed at the lowest level for the last 3 YEARS without even attempting to go up to rank 9/10, it was also stated that this was an incredibly easy task and only costs 1 silver coin (which for some reason he doesn't have and never explained why). That party is complete dogshit, the MC should have been cut off because he was basically trying to play as a level 1 player in a level 30 party which is the very definition of a leech (though the way they did it was excessively ruthless). He was later used as bait when the party that split off from him was being chased by a world-class level monster and they just happened to see each other in the forest while running. The whole baiting thing is very lowkey justified because the sacrifice of an LVL 1 player for the survival of a renowned upcoming rank C party and the information of the whereabouts of this monster being relayed back to the guild, especially since the monster is known for his high reproductive ability and how it can wipe out kingdoms like it's nothing using sheer numbers.
This is complete dogshit. They even brought in a big oppai loli from opposing race of humanity to basically help with his revenge against these evil humans. I don't even know who he's meant to be taking revenge against and whether he should. The family helps protect everyone by dedicating their entire family to learning incredibly difficult techniques for the slaying of absurdly high level monsters, the adventure guild did nothing more than provide incredible privelages for 3 years and only asked for 1 silver coins (which he once again failed to someone afford), the party is probably the best target for his revenge.
I'm willing to bet that this demon girl was either sacrificed to keep their village alive, or was thrown away as a princess of the demon kingdom.
The art is pretty good though