All "bad" presentations struggle to keep the audience interested. The audience squirms wishing they could escape. The audience has given the presenter an hour of their life, so they want that hour to be useful. It's disrespectful of a presenter to not show up rehearsed and prepared with information and insights that will improve the lives of the audience in some way. Presenting will do only one of two things for you: it will either diminish your credibility or yield results. Most bad presentations hurt the presenter's credibility.