Welcome to planes with big elevators.

Too much throw is normally it. The faster the speed of the plane, the less deflection is needed. Vice-versa, Slower speeds require more defection.

There is a change you could add nose weight and reduce the snap, however do it with throw.

This is a good place to use dual rates or expo. Different pilots, different preferences. Dual rates may work better for the newer pilot.

Set the low rate that flys the plane fine, and if you pull full up, it won't snap. Try this at the top of a loop. Fly the plane a couple of times to dial in the plane. Then set your high rate at any higher rate, so you can experiment with different things.

If you ever wondered why you by these radios with rates, expo, trim reset or computer mixing, this is why.

No rates available. Do it with linkage. Outside hole on control horn and inside hole on the servo.

Good Luck