Season 1 is significantly worse than Seasons 2 and on. The issue is that it's a pale imitation of the British version. From Season 2 on, it finds its own voice and is much better for it. They even retool Michael Scott to be less of a brutish dick and more of a childish everyman and it works much better.

A few other comedies in that era had the same problem with their first seasons. Parks & Rec is the other big one.