Could My Incomplete Bowel Movements, Gas, And Poor Response To Laxatives Be Related To My Previous Brain Stroke And Surgery?

I am suffering from incomplete bowel movement, small amount of stool is passing by putting pressure on standing. There is a feeling always that more stool are to be clear. Excessive gas formation in the colon. Laxative as well as prokinetic do not help much, I had a brain stroke and surgery since last 2 and half years