I gave up listening to the Archers when it became preachy, and to the extent that it appeared to be teaching listeners how to behave.
The episode that really got me angry was some time ago, when an elderly man asked Lynda Snell about her Muslim house guests. When he enquired 'what kind are they?' his further elaboration of this question was just so awful and insulting that I found it hard to believe that it had been passed for broadcasting.
Added to this, the writers seemed to think that it was perfectly OK to depict an elderly, presumably middle class man as inevitably racist and crass. Thanks but no thanks, Archers writers. Perhaps take on board the average listener already knows the difference between right and wrong?