Mc is an ungrateful piece of trash. There's a female character who has a crush on the mc but she's described as being very large (she's a fit fat body builder type as well as tall) and the author and the mc both, almost never miss a chance to shit on her and call her names, this despite the chance that she's extremely kind and generous and though she has a crush on the mc she's not pushy or pervy about it and in fact pretty much just tries her best to help him in whatever way she can. For example, the mc's mothers illness (and getting the money necessary to treat it) is pretty much the major plot point and the driving urge for the mc to train and get stronger, well because of the illness his family is poor and couldn't afford to get him a good beast card so the girl lent (gave) him her personal silver card (worth over 100,000) and gave him a bunch of supplies in order for him to be able to hunt and get stronger /the money to help his mom and she did all of this with for no other reason than a minor crush and her own generosity and still despite all this, despite the fact that she essentially save the moms life, the mc and author still never miss a chance to insult her and call her ugly and fat. It's just gross, like obviously you don't have to return her affection but to insult and demean somebody who saved a loved ones life is just scum behaviour.
Fucking trash, literally the first chapter starts with the mc having made an enemy, a cliche young master who's entire bloodline goes on to dedicate their time, money, and blood to being obstacles to the mc. They don't act like people, they act like robots who are aware that the only reason for their existence is to be a mild impediment to the mc, so he can face slap them over and over and over while they never, ever learn but are also inexplicably never punished for it either. And so it goes that there's just an endless fucking stream of idiot YMs who dedicate their existence to being canon fodder so the mc can look "cool", the level of antagonist never gets better or more interesting and the rest of the story is of similar (lacking) quality.
Also it's a system slave fic where the mc has to do what the system tells him to or he gets punished.
Boring, slow, and the mc acts like an unlikable slimey scumbag. Just a straight up villain not an antihero at all (like the tags say). It's also pretty jarring because he acts like trash in every single scenario he can get away with except we're supposed to believe he definitely super cares about his cliche sick sister (who isn't even named).
Also by chapter 27 the mc is already lost in a space fragment/minor world despite being level 1 and having spent almost no time getting set up and for the story to get started.
Just a standard urban fantasy pet tamer novel with a Yu-Gi-Oh paint. The "game" they play has none of the rules of Yu-Gi-Oh and is just a standard pet/beast fight but with rare magic and trap "cards". Not worth reading because of both the bait and switch and the fact that it's just really boring plot wise.
Despite being mostly set in the Holy Roman Empire and surrounding areas, there's tons of "china numbah 1" stuff going on, especially later in the book.