Sadly, your first amendment rights have limitations. And the interpretation of them is very very subjective. It also depends on who decides what is offensive. One minute, someone can spout off about "Fuck Trump" and "Kill cops" but if you say something about Biden or Harris, or speak about the election being rigged, social media giants like Facebook will remove it and give you the ban hammer.
While calling someone a whore might be a little offensive, and is a bit immature, the other issue, rhetoric like that also depreciates any credibility to the sender or the message. Our wonderful cancel culture will go after them and destroy them much beyond the appropriate punishment.
Some employers have specific policies about conduct. They go even as far as your behavior outside of work can reflect upon the company, and can be scrutinized. This includes social media. I know employers that will monitor social media and if there is evidence of behavior contrary to what they believe is appropriate, they can discipline or even terminate you.
Several state and municipal agencies will actually demand your social media sites to examine prior to even hiring you. People have not been hired because of political posts that might be contrary to what the company endorses or they may see a "trend" of behavior that is conducive to what their values.
So, you're freedom of speech isn't quite what it was.