My son has a friend who is perpetually turning bolts the wrong way. I have called him "Wrong Way" so many times that I can't remember his name anymore.

Brute strength steady pressure seldom works, an impact of some sort will work better. If you can put a breaker bar on it and give it snaps instead of grunt force you should have better luck.

1953 Chevrolet 3600
Fried Green T'mater (Vern)
In the Stovebolt Gallery
Caution: Political Statement
Man who runs in front of car gets tired, man who runs behind car gets exhausted.