hey, if your stepdads are mean and abusive to you, speak up man! and if you don't think you can, get help from other people you know you can trust! thats my advice.
I'd suggest reaching out to everybody and anybody you can for help. I know situations like this can be very tough but the best thing you can do is get more people on your side. If things get worse to the point where your life is at steak you should probably go to the authorities. Stay safe and strong, everything will be alright in the end.