The truth is, while you had past jobs you hated or regretted it, you got something out of it. You learned to deal with difficult people, you learned to manage hard situations, you navigated through tumultuous times, you learned a ton about growing, and you found out what you were capable of even in the darkest times. If anything, this can be super positive. You can also just say your past roles "were a good start to your career but didn't fit my future goals as much as this role does" and then jump in to what you want to do in your future and how this role fits.