Oooh you're talking about the submarine… it's consistent for the actual boats themselves, after all Victory Belles art design goes for a look based on attire and aesthetic archetypes of the World War II era. As for the VA, I think that's probably a coincidence TBH, the same can be said about the Russian VA for the Kirov (youtube link related). https://www.youtube.com/watch?v=Hzi3UjYjTmM&ab_channel=BlackChickenStudios
Regardless that's a pretty silly reason to not like a game, especially since those aren't mainline playable characters.
The design for the Axum isn't really that bad, it's no more realistic than any of the other shipgirls in the game TBH. Pic related is a Soviet submarine - not very Soviet or Russian… though other Soviet ships like the Svetlana class Profintern are pretty cool looking.
If you actually look at Axum's character introduction (link below) you'll see that they approach the character as an actual 'Italian Patriot' of that time containing rather surprising historical accuracy.https://www.kickstarter.com/projects/blackchickenstudios/victory-belles/posts/1612397
I have no stake in this, for the record, I just like the art design and found this pretty refreshing compared to Kancolles lazy moe-shit. https://archive.md/kF1Ml
The other image you posted I don't even know what those are since I haven't seen either character anywhere in Victory Belles media, not even as topics for discussion, what are the ship names, cause those look like Gunboats.