You're not alone. I think most kids hear their first bad word from one or both of their parents. According to Kraft, 74% of mothers have said at least one bad word in front of their children.
https://shortyawards.com/10th/swear-like-a-mother
And those bad words are not caused by laziness, stupidity, or a low vocabulary, but by anger/frustration in the heat of the moment.
