I agree with Kari Sue, you cannot manage his recovery even if you think he's doing a bad job of it. His recovery is his to find and work in his own way.
No rehab will ever work for a resident who doesn't have the willingness to get clean. And any addict who has a willingness to get clean will find a way to get there and stay there. This is for your brother to sort out, in his own way in his own time.
My suggestion is to encourage his efforts, whatever they may be and then let him find his own way.
Hugs