Can you suggest something to make Suboxone withdrawal better?

Do it slowly. If you are experiencing significant withdrawal, the best choice is to reduce the taper (if you were coming down 2 mg at a time, go by 1 mg; if you were reducing it every day, reduce it every second or third day). Other medications for treating symptoms - ibuprofen/tylenol for pain, pepto bismol for stomach cramps/diarrhea, Benadryl (diphenhydramine) to help sleep etc.) as well as prescribed Clonidine can be helpful.