I thought it was the 12-year-old with the messy room!
That said, whether children live in their parents' home or share a house with others, they should be able to have their room the way they like but it still needs to be kept tidy and clean. It’s a matter of basic respect for the people they live with.
Let’s be honest most parents have probably ended up shouting at their teenage kids to clean their rooms after asking nicely ten times with no result. Sometimes, they do need a bit of a wake-up call to snap them out of their self-centred daze. No, shouting isn’t ideal but neither is letting a mess go unchecked.
We don't know if OP has problems with her husband. She needs to have a calm and grown up conversation and lay it all on table. Shouting should be avoided but it happens.
Not sure I understand the crying part, or what happened there. If Op's husband is abusive she will have noticed before surely.
Given OP’s abusive childhood background, it’s possible she may lean toward permissive parenting. It’s understandable past trauma can make some parents more passive, cautious, or hesitant to enforce boundaries. Still, overly permissive parenting isn’t ideal, as children need structure and guidance to thrive and teenagers need boundaries and yes they get yelled at sometimes. As long as that's allowed by a reasonable conversation and apology and mending things it's part of normal life. Never shouting sounds extremely weird and repressed to me. Only shouting is abusive. Sometimes shouting is human.