Okay, the author absolutely abandoned the setting of female over male after V3, and Leon is no longer a mob but an Earl. In the game, Leon has absolute superiority over Marie. Marie is afraid of Leon to death. She had a child in her previous life and broke up with her husband, and died b/c of bf abused her. Then, she came to this world and completed a reverse harem... However, that's not the problem. Leon became your typical happy go lucky harem protagonist along with his sister's reverse-harem. Leon's AI and airship are just beyond op. They can literally obliterate a whole country. In volume 3, he defeated the invaders and got engaged with Ange and Oiliva. Everything was fine until that point.

Volume 4 was the start of the downfall of the story when they start the second gen of this "game". Leon became an exchange student of another country because his sister told him that the game had second gen, and so he and his sister + the reverse harem idiots went onto the journey. The country is so-called "the strongest defensive country" because they have endless energy from the holy tree and don't require energy stones to run their airships. Anyhow, Leon's airship can basically go against the whole country. Not to mention, the characters in this second generation became extremely boring with no developments at all. Olivia basically became a shadow. Leon immediately fell in love with this second gen's main protagonist after saving her from the "abusive male main character (Eric)."Ange even went as far as wanting Leon to marry this second gen's main protagonist "Noel" because their country could obtain the seed of this holy tree and couple hundreds of years later they won't need the mana stones. I found Noel as an extremely boring character with no character development at all. Although I'm not a big fan of "holy saint" type of character like Olivia, at least there's growth for her and Ange. However, Noel is just Noel, she's ur typical older sister good at housework type of girl. The author also decided to include other reincarnated characters. Honestly, it became a mess. The reading went from delightful to extreme exhaustion. Could have been a good story, but the author decided to deviate from all the original settings from V1-V3 and turned Leon into ur ordinary op harem protagonist. Sigh.

the MC wonders if this is what it feels like when young girls are sold to perverted middle-aged men when his stepmother tries to sell him off to perverted middle-aged women.

by the end of chapter 11 the MC gets over his insecurities of being unworthy of the 2 love interests and decides instead of accepting his inability to stand by them, he will work to become someone who can.

That said he still doesnt know how to respond to livia's confession by the end of the second volume, but I think he will accept it eventually, this novel has been admirably good about keeping misunderstandings short lived

Oh, you just declared war on my country, invaded, took my girl hostage, tried to kill my fellow classmates and fired cannons with the intention to kill at me?

Best I can do is to knock you out with rubber bullets and let you live! I can't kill anyone, this is the best I can do!

At some point he even outright says that he can't kill and wonders how long he can let the bad guys off lightly. All while subjugating pirates who steal and murder.

Then there is this hugely inconsistent plothole. Why is the head of the country the king when it's supposed to be a matriarchy? This literally doesn't make sense.

A ton of stereotyping about the women too makes it really weird. Why do I feel as if there is incel tier stereotyping towards women?
I could look past these two flaws but the first one really pisses me off.