Why is the Federal Government taking so long to process my return? It has been over a month and they accepted it on the 12th? State already returned.

My wife and I were proactive and filled out are taxes the second we got all of our documents. Obviously, we understand that the government delayed accepting returns until 2/12. We finished before then and it was accepted by them on 2/12, but for the past 6 weeks, it has been the same status that they are still processing. Why is this taking so long? It isn't that complex of a return. Has anyone else seen these delays as well.