When did you start pureed foods post op?
Sounds about right to me. Remember, most of your nutrition is still going to come in through the protein shakes. You are like a baby, relearning to eat all over again. Take tiny, pencil eraser sized bites, chew at least 30 times and don't eat more than a few tablespoons at a time while you work up (slowly) to 1/4 of a cup. If anything feels uncomfortable, slow down, back away and try again in a few days. Easy does it.