Splitting finances when married? Separate account? Yes or no?

I feel like splitting finances, me having my own account and hubby having his, would be a good idea in our home. I make a lot more than hubby and work much more, and it feels like I’m doing most of the supporting when it comes to finances to him and his two children from previous marriage. (Him and I have three babies together too.). I feel taken advantage of financially, although he DOES help with our three babies (ages 4, 2, 7 months) we have together in caring for them as I work. I work overdrive to compensate for everything.

I brought up splitting our finances and having separate accounts and he went ballistic. We have different ways of thinking on this stuff. He feels like because we are married his child support is now mine and my student loan is now his and it’s all combined. My brain works a little differently and I see these things as more separate. Either way, I feel like I don’t have a choice because he absolutely flipped.

Idk. Maybe I’m wrong. What do you all think?

Also, we have his two older children every other weekend due to us living too far from their school. They are 11 and 14. (Also, in case you are wondering, I don’t claim them as “my” children. They are my stepkids. The kids like it this way. We have sat together as a family to talk about it. They like only their mom and dad to call them “my kids.” I am their stepmom AKA adult best friend is kind of how our relationship works. We have a great relationship)