It is tremendously difficult being a parent of autistic children. Especially if you are autistic or ND yourself.
I have two young autistic children and I have ADHD and am autistic. DH is NT. My children are my absolute world, and when they are calm happy and regulated there is no one I'd rather spend time with. Both of mine have no learning difficulties, are very articulate and doing really well in education (one has full time support under an EHCP). Both mask, massively at school.
However when they have meltdowns - usually as a result of masking at school - it is hellish in our house especially as they set one another off. How I would cope of I was a single parent I do not know, single parents also dealing with this I take my hat off to you.
The vast majority of the time I am able to deal with the screaming, spitting, aggression, violence with a cool head. One, because I know they can't help it and two, because shouting and getting cross categorically makes it worse anyway. They need me to be in control when they're at their most vulnerable, and have no control of their own. However I am only human, I find the noise intolerable (Calmer or Loop earplugs help) and I have been known to raise my voice on occasion.
It also helps to be able to explain once everyone has cooled down that on the occasions that it happens that everyone had needs, and everyone - even grown ups - sometimes gets things wrong or behave in a way that's not perfect and needs to say sorry afterwards.
Solidarity to you all. It's tough. Especially when you're on your third meltdown of the day and someone with NT children says 'oh yeah mine has tantrums too'. If only! 