Grammatically OK?

English as a Second Language English Vocabulary, Grammar and Idioms
1
  1. Don’t do nit-picking and flinging mud on others.
  2. Don’t seek an opportunity to fling mud on others way.
  3. Don’t take others’ comment as a personal affront.
    Are these sentences grammatically OK?
    If they are not, please correct them.
2
  1. Don’t nit-pick and fling mud at others.
  2. Don’t seek an opportunity to fling mud at others / in the direction of others.
  3. Don’t take others’ comments as a personal affront.
3

sorry, I have a query.
Could you please help me to solve it?

What does “Fling mud at others” mean?

Thanks in advance.

4

As an idiom, if someone slings/flings/throws mud at another person, they try to make other people have a low opinion of them by saying unpleasant things about them.