Keep in mind, the Federation didn't even exist yet. Humans underwent their prosperous unification but after experiencing their first attack from an alien power (ignoring the Borg here), they went back to their aggressive ways. The "War on Terror" here was ultimately a bad thing for everyone, so Archer decided to bet on peace rather than continue it.
The show isn't as progressive as other Star Trek shows but it has it's reasons for it. We see them trying to be better.
Why do they look like toddlers standing in front of their parents with beshitted pants?
Also, I welcome the recent uptick in Enterprise-posting.