How to have steering wheel free and easy without losing ffb ?

Some context here. I do have the base Moza R9 with the Rs v2 wheel (round). But to be honest, I don't believe my question is specific to my hardware.

For example, I drive the Honda NSX car, and I do feel the wheel extremely stiff and hard to move in all directions. I reduced to 0% all settings in pithouse, all FFB settings in game to 0, except the FFB itself to 100%. I like to feel all the details, like the curb, road texture, etc...

I thought it could be the friction, but as I mentioned, all is at 0

Can someone explain to me some basic things i don't catch