Ok so some of you may have seen my other posts previously throughout the year. But I'm back and need some advice

Our daughter just started preschool and had her first day today. I wanted to take a picture with her for memories sake. My STBXW was taking it as we have been cohabitating for about 4 months(whole different beast) but we are amicable for the most part besides a couple fights that she instigates I believe.

Now, back to the picture I crouch down next to her and I noticed my kid has some snot on her face from a recent cold so I get a baby wipe to clean her up real quick and my wife says to move over "it's common sense" in a really shitty tone and my daughter is fighting me on wiping her face. And my wife is just still going like move over move over! And finally I just stood up said "fuck it" and walked to my bedroom. Then she charges in an goes off as I sit there in silence how I wanted but no she had to just lay into me. After a few minutes as I'm laying in the bed sobbing, my daughter came in and asked me a question and cheered me up and I gave her a hug. Then wife comes back in and asks why's it ok for you to cry Infront of her but not ok for me to stand up for myself to you Infront of her. (Apparently I'm a gaslighter) I told her I just wanted some comfort from my daughter and she looked at me like I was about to shoot her. And she said you do not use your child for comfort when you and your spouse are fighting, cause I guess it makes the kid feel like it's their fault or some shit. I legitimately did not know that if that's a real thing. And she just kept barraging me with bullshit, that I just shut the fuck up and said ok so she will stop and leave me alone. Am I fucked up? I need to get away from this borderline personality psycho