These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: Mondaiji Tachi Ga Isekai Kara Kuru Sou Desu Yo
Awesome Ego: Izayoi, the most arrogant and violent out of the main cast. but hey, anyone who makes defeating a water god look easy (at the end of the first episode none the less) definitely earned bragging rights.
He barely breaks a sweat when he completed a Gift Game in the Episode 4 in one night that according to Kurousagi would have taken years.
And let's not forget his inhuman strength. He made a crater by simply flicking a pebble.
Complete Monster: In episode 2, Galdo Gasper tells Kasukabe and Kudou about how his community became so powerful because he would kidnap women and children from other communities, and then would blackmail them into taking part in challenges. When asked about what happened to the hostages, he said he killed them.
God Mode Sue: Izayoi seems to be falling into this trope. Just about every battle he's been in usually has him deliver a Curb-Stomp Battle to whoever's facing him. If he seems to have any trouble, it's mostly because he seems to want to give them a Near Villain Victory right before utterly crushing them.
Les Yay: Asuka wants you to know Kurousagi's sexy legs belong to their group.