It's quite interesting how different riders either like or hate any given saddle. It's hard to predict!

Don't give up until you've ridden at least 3 to 4 weeks, maybe 3 or 4 rides a week. Even short rides should help you get adapted. Your butt needs to get used to sitting on a saddle. (I remember putting some foam padding on top of the saddle when I was just starting riding--that helped on the first rides.)

Saddle setup
Start with the saddle level. If it tilts forward, you have to push back against the handlebars to keep from sliding. But some saddles work best with a very slight upward tilt to the front.

To set the seatpost height, I coast along, sitting on the saddle, then see if my heel can set on the pedal without stretching. That way, when I pedal on the ball of my foot, my leg has a little bend when it reaches the bottom of the pedal stroke.