Actually, it isn't. If you are talking about building the tech from scrach
then you would be right, but you're not doing so in this case. The science
the BGC universe is in some ways more advanced than that of the ST:TNG
universe for example.

Yes, BGC is advanced. Just not in the right technological areas.

Take Boomers for example. There's nothing like this
kind of tech in the ST:TNG universe. Data and the Borg are a joke. Largo
could've mopped the floor with them without breaking out into a sweat
(if he could sweat, that is).

First, Data is not built to be a warrior. He gets buy, but to a droid truly
built for combat, like Largo, yeah, he'd be at a disadvantage. But
remember, his true resource is his smarts. Sylia beat Largo because she was
a step ahead of the game. Largo had a lot of raw power, more powerful than
the Knight Sabers, but he _still_ lost.

Largo lost because he let his hate for the KS overwhelm him. 

Strength is useless if you don't know how to use it.

This really applies to the ST:TNG universe doesn't it?

As for the Borg, they adapt. The first few times Largo destroys a Borg, the
Borg will be toast. But the Borg will adapt to his beam cannons,
arm-blades, superior strength, ect and just keep comin'.

And what makes you think Largo wouldn't adapt? All he basically would have to do
interface with and take over the Borg's C&C network. Remember, Largo and sexaroids 
like Sylvie have something your typical Borg doesn't have and wouldn't know how to deal
with.  Free Will.

A society that could build Sexaroid/Doberman/Largo class boomers could
quite easily have the resources to emulate the technology used in
transporters and the like once they are pointed in the right direction.

Nope. Being able to build a transporter takes being able to manipulate
subatomic particles in precise ways. It's true that the BGC world has
nanotech, but that's just not sufficient to build a transporter. The BGC
world has not yet discovered the Heisenberg Compensator, which makes
transporting and reconstructing a pattern that much more difficult.

How do you know what's going on in the research labs in a company like GENOM?
 It could simply be called something else....