Got stuck on this. The ground was not soft but was as slick as snot after ATVs & 4X4s had driven over it a few times.

Told the DW not to let me back the rear wheels even an inch into the muck. She did.
Got myself out by jacking up & getting the rear wheels on leveling boards we carry then not stopping once I got it moving on unchewed up grass.
Most of the time it does not take much hp to get out of a stuck situation, just a bit of traction.
The throttle cowboys who dig themselves in are the ones who really get into trouble.