What can a person to do ruin an otherwise perfect date ?

Women in my experience have 2 lousy habits on first dates. Talking bad about past men they have been with and texting on the phone on a first date. Both are rude and automatic deal breakers for me. One date with those women and it weeds out a ton of them. Love the ones who say they hate men but are on a date with you..the man. How dumb can you be.