I find I have an aversion to foul language. It is mainly esthetic, I suppose, but my reaction is to consider the speaker a jerk.
I would suggest that you have a maturity problem, then. Not everybody agrees on what constitutes "foul language."
And focusing on the words, rather than on the meaning, is an immature way to approach language. I would suggest that there's a reason that they call it "adult language", and why running off to tattle on someone who used a bad word is behavior that we associate with children.
English has lots of adjectives and adverbs, so there is no need for foul language when one wants to make a strong point.
Some of those adjectives and adverbs are what you call "foul", though, so I don't understand from what basis you would pretend to be the arbiter of appropriate language. Is it so hard to imagine that many of us might have a different idea about what constitutes "foul language" than you do? That some of the words you dislike - so much so that you would immediately leap to judgment about the speaker - aren't such a big deal to those of us who outgrew sniggling at dirty words in the 7th grade?
Indeed, there really
are no replacements for profanity. Bowdlerized Shakespeare just isn't the same. And there's really no substitute for what precisely is communicated when you tell someone to
go fuck themselves.