I am a wordsmith, and I consider “shit” to be an acceptable and very useful word. What other word conveys the same meaning? Those four letters form a word that is very easy to understand. The meaning is very clear.
My favorite reply to my use of the word was from a twenty-something “Out of your ass, not your mouth.”
My grandmother used to say “You just had something in your mouth that I wouldn’t hold in my hand!”. Of course, this from a farm girl who handled animal manure on a daily basis…