They sabotaged your orders, then they tampered with your car, your life may even be in danger, and you're wondering if you should stay?  The writing is on the wall, and the message is written by them!  With their history of "hire and replace".... looks like you are next in line...so why wait?

There's another underlying issue that MAY affect you deeply.  You may start thinking that what they're doing is normal behavior and it may even become okay with you to tolerate their decisions that are not in your best interest, nor that of the company.  This will cement a victim complex and will continue to dis-empower you until you feel lesser than....and you know, you are a lot more than that.  Don't let it happen to you.  Decide to decide and get the hell out of there.