My son was doing so good sleeping, making progress doing better... Then he goes to his shit head…

My son was doing so good sleeping, making progress doing better... Then he goes to his shit head sperm donors and then he comes back and sleeps like shit. I'm so fucking over it! 😡 this is why I didn't want him going with him this little because he gets all out if his element there and his father undoes all my hard work. Dude Only has to deal with him one night so he doesn't care and does as he pleases with him despite what I say 😒