1) Abuse 2) Botch 3) Bungle 4) Care 5) Deal 6) Handle 7) Handle badly 8) Make a hash of 9) Make a mess of 10) Manage 11) Manage badly or incompetently 12) Mess up 13) Misconduct 14) Mishandle 15) Misuse 1) Botch 2) Err 
• (v. t. & i.) To manage ill or improperly; as, to mismanage public affairs.
Mis·man'age transitive verb & i. To manage ill or improperly; as, to mismanage public affairs. 
[v] - manage badly or incompetently