I have yet to be provided with a solution that can consistently beat a bofors and the only time I can beat it is when the british player doesn't set up shop w/ mortar pit and at guns and only then can I consistently beat it with OKW.
I have literally tried every suggestion on this forum and nothing works well. The bofors does not have a counter (edit) that the british play can't easily adjust to.
That's the thing, like in this video, the only reason that the double Lefh wasn't countered was that the Brit player was crap. He could've easily destroyed those howitzers with the gammon bomb or the comet.