Your second kid is hurting your first kid (probably not intentionally but unwanted noise causes actual physical pain. Why are you letting that happen? (Just read any thread on misophonia in adults) He's been in school all day being tortured by noise, lights, people, lots of bloody people, behaving, smells, (schools stink) listening to teachers while trying to tune out the clock ticking, pens scratching on paper, the pe lesson outside, next-door class, etc.
He needs silence and alone time to decompress as part of his disability. Stop DC two hurting him and you will see an improvement in family dynamics.
Arrange it so it is win win for both kids.
Maybe the headphones hurt too. Try different pair or put them on h.
Have a quiet hour where everyone is quiet for an hour when ds1 gets home. Ds 2 can watch something with headphones or go out to do something with a parent.
Do regular calming activities with Ds 1 too. H needs to do them too. He's probably shouting as getting sensory overload too.
Are you NT? Is Ds 2. If so you take him out and the aspies can stay at home in glorious silence.
Once things are calmer you can deal with ds1 verbal responses and teach him how to recognise overload, how to deal with it and appropriate words. While they are wrong at the moment, you aren't going to fix them until he is xal and emotionally regulated enough.
You can't parent like NT parents. You've got to analyze the situation and prevent sensory overload. Sod NT expectations of the ideal family and do things differently. (Eat separately for example, if it's a sensory nightmare for autistics, and emotional nightmare for the neurotypicals ) you have a disabled kid and you have to meet his needs differently.
Screen time can be calming(if the right sort)
Try not be fixed on society's ideal of how families should behave. Your family isn't a TV commercial