Nope. You just sign a contract without reading it, that’s on you.
Or did you think them being pushy while you actually read it wasn’t because they never ever try to sneak something in?
To clarify, you can’t add something way out of the pale, like “upon termination of this contract all assets of [whatever corpo] belong to FuglyDuck”… but you can definitely cross out terms you don’t ageee with (for example, the arbitration clause.)