Having issue with golf ball game physics

Look into physical materials - these allow you to assign physical properties to surfaces (inlcuding the ball itself):

In order to have a more bouncy ball, you’d increase Restitution on the material assigned to the ball.

This way you could design rubberised, icy or sandy surfaces and apply them where needed. It may take a bit of fiddling to get the numbers right, though.

And here is the reference: