I think foam is probably the shortest lived material for a bike seat. You can explore the leathers or the plastics. You are probably used to cushions
but they eventually give out.
Sitting on a leather seat (Cutouts can be found on the selle an-atomica)
there is less give, but the feeling i get (except when going over a bump)
is that i am sitting in space right above my saddle and maybe i am.
Sit on a wooden chair. that's kind of what it's like (but leather is softer than wood of course). If you hate wooden chairs; stay with padded saddles.