What is the weight of your boat, trailer and motor combined? I believe you are way over the tow capacity of the vehicle. If that is the case it’s a bad bad idea to tow your boat even a half mile. And pulling it up a steep launch ramp if it’s grossly over tow capacity will likely break something like your transmission. Towing it even half a mile can be dangerous. Your brakes are inadequate, your suspension is inadequate, transmission inadequate, tires inadequate etc etc. But again it depends on the gross weight of your boat, trailer , motor and equipment.