We don't have to and usually don't. Just don't pick the bad ones. You are talking about love island ffs. That's not reality. It's coro with less clothes on.
Please stop. “Don’t pick the bad ones” as if boys come with a label. There is no way to tell what someone will be like until you experience them so please stop shifting the blame and STOP DISMISSING A VERY COMMON OCCURENCE FOR TOO MANY WOMEN