In a very close game I would kill my team.
Why would you want to kill your team?
Because I'm tired of losing and I want to be a winner for just once.
It sounds like you are frustrated with loosing and taking it out on your team. It is not okay to cheat and play like this, maybe you should find a new team instead.
It's their fault I lose all the time, though.
Even so, you shouldn't take your frustrations out on your team. Play fair and improve with your team.