Hi! I'm currently just starting my puréed stage as well. I go back and forth between constipation and diarrhea, and it really doesn't seem to have any correlation with what I eat. I totally feel your pain. My surgeon has me at 80 grams of Protein a day. For me, that means three premier Protein shakes and whatever other protein fortified puréed foods I can handle. I had refried Beans for the first time today, and puréed chicken salad. I was able to tolerate both!
I know it's a struggle, but staying away from high fat stuff really helps me. I use non-fat fair life milk, and low fat cheeses in a scrambled egg. Switching to a milk substitute might help too.
I'm so sorry you're struggling but it will get better! I felt similar to you for the first week or so, so I know how bad it feels to feel like you can't do anything. It will get better!