Is it wrong of me to want to end this relationship so I can prioritize myself?

Hi ladies, be total honest with me please.

I’m engaged, but i don’t think I want to get married i actually wanna call off everything. My fiancé is a good guy, not completely perfect but he means well lol. My problems is his BMs. He has two and they both have him on child support. He pretty much works to just pay child support. $2,000. Whatever is left he can only afford to either pay rent or beer. He can’t provide for a house, he can’t even get a car, nor a passport because he’s on child support. On top of that, the drama the BMs bring. Again, i love him but what he brings to the table is nothing but drama, and child support. I would have to continue to be the one to provide for everything, a house, a car, and pay for extra expenses and provide for his kids at our place. While he pays for two other houses holds and still pay extra on the side. Have i even mentioned his BMs are rude ass hell? I’ve been respectful, I’ve taken care of their kids, i follow their rules, etc. I could have started school last year in October but I didn’t because I’m the one who picks up the kids from school. I’ve lost myself trying to prioritize him and his kids and please his BMs so he can have his kids around.

Is it wrong of me to want to end this relationship so I can prioritize myself? I feel bad because he is worthy of love but what he brings and offers me just isn’t what I want for myself. For the past three years I’ve done my part so things can run smoothly and both ends be happy but it’s so impossible because through the process, I’m not happy.

I deserve better. I sound like an asshole but what do you guys think?