Definitely a larger pest but can't speculate past that. Likely a rodent of some sort: groundhog, squirrel, chipmunk, field mouse or rat.

I've given up growing them because the chipmunks always get them before I do.

I see some signs of mold there, above and to the right of the demolished fruit. Either the perp. broke those leafy bits or you have some disease going on.

My strawberries are netted. I haven't seen too many slugs, but they're there (I did find one yesterday right by the evidence of its strawberry dinner), and they eat half a berry just like that. It tends to be the half that's touching the ground though.

Ive had palmetto bugs/roaches do that.