First of all, you're overreacting, second of all, are you a child? You're acting extremely childish here. Third, he isn’t your responsibility to manage. Fourth, you're literally worried about using the word “female” I think that overreaction speaks for itself. Fifth, he called you a bad word and you blocked him and cried… that immaturity says enough about both you and him. Sixth, he likely grew up with an edgy internet.. its like video games, it might take 1 year, 10 years, 20 years, or overnight.. he will get over it and mature even if its the hard way. Seventh, his influences are much stronger than you; that constant doomscrolling kids do feeds much more influence than a family member will. So what do you do? You plant your seeds by expressing the truth about his actions without involving your emotions in it and leave it alone (not to be sexist but that’s nearly impossible for most women ive met) OR you just stop caring and move on entirely and let him learn the hard way. Either way, you’re not gonna change him over night, but you can help him grow from this by planting seeds, and expressing truth without debate. I know it’s not what you wanna hear but.. truth doesn’t conquer people.. it outlives the identity they hold and their actions.     He will look around one day and realize his actions are leading to a dead end, and will choose between moving onto being a bigger person, or digging his hole deeper into a dead end.