Sick of my husbands shit

Idk what the hell is his deal with him and his “step son” (5) ever since we had a daughter together (1) he acts like I favorite the kids when it’s clear as day he obviously favors his daughter more since she’s biologically his when it shouldn’t even be that way . He literally just tried to make me feel like shit saying I got my son way more presents than our daughter when that’s not even true cause every time I shopped I made sure they had a equal amount of presents . He’s such a dick head like i don’t understand , I love my kids equally , he might not but I do they both came from my freaking v*gina!!!!