In laws hate me for helping they're son

I'll try to make this as short as possible. A few weeks ago my husband & i got into a huge argument bc of his drinking with his dad, we don't have our own place so we stay with my parents and our 11 month old son. That night i went to drop him off at his parents and i left because i had stuff to do, i told him to gwt dropped off at 8pm and he didnt answer any msgs or calls till 3am asking me to pick him up. i was furious because i was not about to wake up my son or parents to go get him at 3am and extremely drunk. so he ended up coming home at 8 am, showered and left again while i was sleeping. He went to a party with his family and again got really drunk and i also later found out he did drugs with his BIL. That night i went to look for him at his parents house and he wasnt there, while he was gone his mom and sister walked up to our truck and start screaming at me alot of BS about how im a horrible wife, keep in mind I'm helping my husband with his alcoholism problems and drugs problems when i could of walked away since the beginning and left him alone to be in prison or dead, i send him to work with breakfast and lunch he comes home to a nice dinner everyday and has clean clothes all the time, i went as far as talking to a psychologist to get help. i spent a good hour there listening to them scream at me i did defend myself of course but tried my best not to be rude. the people screaming at me are also the ones who let their kids get drunk every weekend as soon as they turn 13, let them be out in the streets till 6 am at 15, talk about how their daughter used to get beat up by her husband like its nothing and laugh about it. My psychologist told me this family is clearly a dysfunctional family and they need help and that if i want my husband to get better i need to get him away from them a little bit so i did . now they expect me to go visit them and take my son like if nothing happened and im not having it and they are calling my husband and talking all this BS about me.ive gone 1 time just so they could see my son and we left quick so they were making faces and saying stuff. how would you ladies be if this happened to you? i dont think im wrong honestly im simply trying to help my husband become a better person because he asked me to help