Interviews are not all about getting the job. It is about building relationships to see if you want to work with this person/team for the long-run. You do not want to 'win' every single interview because your values may not be aligned. Working for a company with different values than you is not fun. You want great mutual understanding and trust, even if that means they screen you out or you screen them out. It's not personal. These are huge decisions for you and prospective employers. Be honest, vulnerable, concise, thoughtful, and get to know your interviewers well. These meetings should arm you to make a decisive decision should they make you an offer.