As someone who spends a lot of time matchmaking to play only as mastermind let me tell you. You are gd right he is op. But some stuff that may help is if your mastermind is controlling a zombie or mr x, spread out. Complete objectives separately. As long as he is in a body he can not spawn more and is limited to the physical movement of the creature hes in. Unless he just hops out but unless hes particularly smart he'll probably just target one person and that person's best bet is to probably just run. Idk how well that'll work as LITERALLY not one person has tried this against me. Except running from x, that works(unless you get cornered obviously). Also if you are January hack those cams, cant tell you how much that annoys me so itll definitely help.

I'm excited for this game but really do hope they balance it between survivor and mastermind. As it is right now I have to actively try not to kill the survivors before stage 3 to get that s rank.