What to do when 1 out of 4 kids is a pain in the butt all the time?

My wife and I have four children. We are a blended family of step and bio children/parents. The kids are 14 boy, 14 boy, 10 girl, and 7 boy. The 2 14-year-old boys are about 6 months apart and my bio son (the younger of the two) has always been challenging. If it's not what he wants to do, he tends to either try not to participate or make things miserable for us while we are there. I was always thinking that it would be better for him, in the long run, to participate in our family activities. (things like trimming the xmas tree, going hiking, watching a family movie, helping fix supper, etc). While I still do believe that he is better off if he participates, it sure makes the experience for everyone else miserable. Drama surrounds him. He has a negative effect on the relationship between my Wife and me. So redditors, here is my question.....at what point do you decide to just leave him home and not participate? And does this make things better or worse? Have any of you dealt with something like this? Please help me! :) thanks! via /r/Parenting http://ift.tt/2uTnyhe