Frustrated😤 just wanted to put the crib together with my SO but he just is acting like he's macho…

Frustrated😤 just wanted to put the crib together with my SO but he just is acting like he's macho and knows everything and getting frustrated so he blames it on me and tells me he wants to do it himself. Like ok not my fault your frustrated but why does that make him mad at me and tell me to stop helping. Like I just wanted to do it together. He's such an ass 😢