No matter which way you go you have to get yourself out of the cycle your in. It sounds terrible. I've had obstructions and they are painful. I also had a twisted bowel (had to have my 3rd surgery because of it). But what your going through and how long you've been going through it is no way to live.
When my surgeon took my pouch out she left everything intact in case I wanted to try the pouch again. I won't but I was never sewn closed on the outside. I still have my anal canal. And anus. Everything is still there. That's a path you may want to ask about.
I'm no expert and most of what I went through is fading now. As is my memory with age. Lol.
I wish you the best.