You’ll never eradicate them with hunting. You have to trap the entire sounder.
The problem is that there are people who don’t want the wild hogs eradicated and who interfere in trapping and import wild hogs into places where they don’t exist.
https://www.kansascity.com/news/politics-government/article86654827.html
https://mdc.mo.gov/conmag/2016-09/sounder-approach-feral-hog-control
We have trapped them for years and have many traps that we occassionally set.
Hogs are smart. You have to bait them a while until they don’t think it is a trap.