I’m sorry but this could be dangerous advice to give to someone. At seven weeks post op, my diet progression from my surgeon said that I should be able to eat salads, cooked vegetables, ground meats, well chewed pieces of soft meat, cereal, etc...
Original poster is stating they are in pain just trying to eat some purée food, which most of us start post op at three to four weeks. There is a difference between wanting to lose weight quickly and encouraging someone to put their health and life at risk.
Original poster could have symptoms of ulcer or structure. Please get checked out original poster to make sure you are ok.