We get a fully formed and realised Starfleet with a clear purpose and the same ethos and ideals as we see in the 23rd and 24th centuries, despite basically just being created and only having a few ships at their disposal. There's no learning curve. Enterprise is a super ship that forms the Federation all by itself within the space of a few years. The political situation of the Alpha Quadrant at this time isn't really established, despite the fact the tyrannical Klingon and Romulan empires would have been the major powers during this era. We never get a sense what their influence is. A primitive Starfleet with limited capabilities reacts to the Klingons just like they did in the 24th century. You might imagine discovering the existence of a huge interstellar empire controlled by an aggressive alien species who could easily invade Earth would lead to a massive ship building effort to defend Earth and its interests. Better writing could have shown the Klingon Empire to be a dangerous bullying galactic super power that motivates Starfleet to create alliances (that eventually becomes the Federation) in order to counter this threat. Instead it was over a Romulan drone. So basically it was a good concept that was badly executed, let down by bad writing, bland miscast characters and dreadful world building.