you are either a liar because the Stuka is not at all effective against a bofors, or you are an idiot because you do not know how to use the brace structure and your engineers. Maybe you didn't know, but they can repair Bofors!
Royal Engineers have a -75% repair speed penalty on braced emplacements. 2 LeIgs with flame barrage delete any emplacement within 2-3 min, just dont use both flame barrages simultaneously but consecutively.
1st flame barrage forces brace, 2nd one 25sec later removes a large amount of HP.
So yeah, these "emplacements too strong" type of posts cant be taken serious at all anymore these days, especially now that LeIg and Mortar Halftrack have access to these strong incendiary strikes.
And even if you dont have Feuersturm, the only thing that changes is that you need a 3rd LeIg ideally if he has more than 1 emplacement