If your "asshole" is a psychopath, find others that have been under his or her path before, collect evidence. If your "asshole" is unable to cope with stress, a

If your "asshole" is a psychopath, find others that have been under his or her path before, collect evidence. If your "asshole" is unable to cope with stress, ask peers how they are doing, ask for advice on specific occurrences of issues in a non-confrontational way. If your "asshole" is just a mean bad-manager, just says "Yes Yes" and move on before he blows something important up.