Part of the problem is that different people mean different things when they say "realistic". And the people reading their comments also understand the word differently. For some people, they're using it to talk about setting (they dislike some of the wackier 50's sci-fi stuff), some use it to talk about game mechanics (they dislike some of the RPG mechanics vs. FPS mechanics like in Counterstrike), and others mean yet other things. This leads to lots of possibilities for miscommunication.
Which leads me to....
Dude, there's suspension of disbelief and there's random, stupid [censored] made for kiddies. Fallout is a fictional world with some things diffrent from ours, but it's not a place where girls wearing pink dresses and armed in japanese swords should run around doing more damage than a PA-wearing soldier with a minigun (a real situation from Fallout 3).
The problem here is that you're complaining about two different things simultaneously.
1) You don't like the combat mechanics that allow someone to attack a Power-Armored person with regular melee weapons. And, hey, that's fair. And Obsidian's apparently doing something about that with this Damage Threshold thing.
2) But then you've also got some weird sorta-anti-anime rant going with the "kiddies" and the "girls in pink dresses with japanese swords".
And that really has nothing to do with point 1. It's an aesthetics thing, not a game mechanic thing. Well, the "attacking someone in a dress" part could be part of the complaint about armor and damage mechanics, but in context with the "kiddies" and other stuff, it comes off as just an image thing. Seriously, though, I'm having a hard time connecting the Pre-War Parkstroller Outfit (is that the pink one) and a Chinese Officer sword with this odd anti-anime/anti-kiddy thing you've got going. It's quite confusing.
(I could see the anime thing if it were, say, a typical Japanese sailor dress, but it's just a 50's-style pre-war thing.)