First remember that you are only four months from take-down. You're pouch is still in the process of adapting and you're still learning what you new "normal" is. Unfortunately, it takes a while for things to ease up. (Sorry, but it took me at least a year.)
Carbs and sugars are gas promoting. Think of sugar dissolving and feeding the bacteria in you gut. They have a party and wallah - you have gas. I understand the need for carbs to help thicken things up, but you have to be careful because too much of a good thing is too much. You may want to start a food journal to see what types of food are affecting you the worst.
That being said, have you tried taking Gas X for the excess gas? It has been my friend when I ate too much of something that caused painful gas. I also take Beano before eating anything that might be questionable for gas. For example: I take it before eating any vegetable, beans, or oats. Another thing to try is peppermint tea. It helps me to settle things down for me. I love sugar, so I have to be careful I don't overdo with that or I get pouchitis too.
I hope you get some other practical advice from more of our friends here.