Why are cyclocross bikes stiff and what impact does it have on performance?
Race courses in city parks are not that bumpy.  Most racers run closer to 40 psi (on a 34 mm) but it varies.  Clincher tires to run low pressure with pinch flats is common. The bike is stiff for speed.

The Revolt 3 is not a true CX bike.  It probably came with a 35 mm. That bike will take a 50 mm.  You can safely run 50 mm at 40 psi (check the range on the tire) and get a pretty soft ride.