Sorry you are having these problems. I’m only 4 months out but I am the same. If not liquid, I have to strain and push and I get so sore, and usually even then I still don’t feel empty. My surgeon has been less than helpful and I also don’t have a gi right now so I understand what you are going through! The only thing I have found that helps is instead of straining, which for me usually comes morning and night but during the day I’m fine, I use a warm tap water enema. Approved by my surgeon. It’s the only way I actually feel empty, don’t have to strain, and am not sore afterwards.
However, I do continue to search for answers on why it is happening in the first place!