Lock keypad mounting

Anyone had issues with the lock keypad mounting screws? I installed mine today and the screw heads stripped so bad I had to remove one with pliers and drill one out.
I have other screws but, it took about 30 minutes to remove these screws.
Also, I have a stucco house so I am mounting on the door trim. Once I could do a test fit, I discovered I need a shim or washers in the back due to the case molding.I
It would have been nice to have an adapter like the doorbell has.