SS9 comes running into the house. As I'm yelling "be careful the baby is in-" SS9 trips over baby who was playing in floor. Immediately, its chaos. Baby screaming and crying SS9 sits on the couch and bangs his head on the wall saying over and over "I can't do nothing right" I soothe baby and tell SS9 to start his homework and then continue cooking dinner. My typical SO ignores everything and continues watching TV. SS9 starts crying (he cries daily) and talking about what a looser he is. SO pulls SS9 into his lap and babies him. (never mind the fussy baby who just got trampled on) In front of SS9, SO tells me how mean I am to his kids. I asked for examples since I said nothing to SS9 about being careless knowing the baby is around. He said obviously there are issues since SS9 feels like he can't do anything right but could give no examples. SO then tells me that because I enforce rules and discipline, make the kids behave, show respect and equip them with manners and life skills-that I'm too hard on them. He ends with the comment that I "have no respect for their wellbeing" for the first time in 2 years of dealing with this crap, I completely lost it. I asked about the well being of BS8months (who's a preemie should only be 4.5 months) I then threw the half cooked dinner in the trash and told him to go eff himself. I left with Baby and we are enjoying a nice meal at a restaurant. Of course it can't end there. SO text me saying how all this is my fault. I realize now that I'm ok with failure. I'm ok with the fact that he cannot parent his children. He has had SS9 and SS13 full time for 5 years and they are a product of him. Its ok that we had a baby together and moved in together for the wrong reasons. There's a reason I lived alone through my short pregnancy. I'm ok with failing at my role as a step parent. Its unnatural for me. I'm ok with all of this. I will not allow my BS to take on any of the same traits of those hellish skids. That's why, I am leaving. I told SO he had till January to find a job because I will be moving out. I deserve way better than to be treated like crap by kids that I financially, and emotionally support 100%.