Are my feelings valid?

So my ex left me. Our son is 2 months old. We were together for 7 years. He was so so toxic to me. He would be so mean and I’d tell him that it wasn’t okay to talk to me like that and he should apologize... he’d say “I’m sorry” so meaningless... I’d say really that’s all you have to say... he’d tell me to stop talking or he’d have his mom get him & he’d leave & I should just accept his apology so it doesn’t come to that. I’d say “you called me a cunt?” “I’m sorry” isn’t really good enough? I got so fed up that I eventually stopped shutting up, and what do you know, he left. Now he’s living with his mom at 24 years old. He has no car. He has the $$ to get one and was suppose to, but 🤷‍♀️. Hence why his mom would literally pick him up anytime we’d get in a fight. & Now he’s at his moms and all he does is play Xbox and drink. And it makes me so mad I’ve tried to tell him how it’s ridiculous he’s doing this & how tf can you walk out on a a family & a woman whose loved you for 7 years to go live with your mom. Walk away from seeing your son everyday. Only 10 weeks old:( It makes me so mad none of his family slaps him in the face! 24 years old left his family to live w his mom, play Xbox and get drunk! I also see him posting all the things he’s doing with his family like snowboarding or playing games with them and it makes me so sad because I would BEG him to do things like that with me:( he never would... he’d say he’s too tired from work. His mom made dinner and he posted it. I made dinner every night and he never posted it :( he does chores at her house. I would BEG him to help me around the house he never would or it would cause a fight:( he’s asking for me to bring our baby there and I really don’t want to. Of course I will tho:( but it makes me so upset I was so fkin good to him and he was so bad to me yet somehow he acts like he’s so much better off without me:( and it sucks to see him doing the things I BEGGED him to do😭😭

Why are people saying not to bring the baby over? I mean I’d rather not tbh. But I feel like if I don’t everyone will say I’m trying to keep baby from him and that I’m bitter he broke up w me and using our child.