At the end of the day, it's down to us - "the people".
If as a mass we are happy to be fed the lies and crap spouted by Farage (because they massage our overinflated sense of importance) then no amount of fact checking or holding to account is going to stop people supporting him.
Just look to the US for the logical conclusion to that. People happily excusing Donald Trump crimes they would crucify anyone else for because he makes them "feel good". He really could shoot up a school, and MAGA would rush to tell you the kids deserved it.