itsnotmessy - I want to reach out and give you and your DCs a huge hug.
My exH was like your H.
Complaining about 'mess' made by five children in a small house was his way of controlling our lives.
You have to give him a choice of either putting up with it or going to a doctor to have his 'anxiety' investigated. Don't try to accommodate his unreasonable demands. He will not stop at toys. You are being trained to feed a bottomless ego here.
Do not let him carry on like this with his lists of things to get rid of and his harrying of you and the children about whether you play with toys or tidy up toys.
As MissWimpyDimple says:
It will ultimately affect your children's mental health if you let this go on.
My own DCs have one by one gone NC with exH as soon as they did not have to participate in (forced) visitation any more. There will be no invitations to exH to weddings or graduations or any of the events a father would normally be present at. He has only himself to blame. I am far more sorry for my children however. They did not have the carefree childhood I had.
I remember one day when DS was about 6 telling all the others, 'Quick, daddy will soon be home. We have to clear up the toys,' with an air of urgency and real seriousness. If I ever went out and left the DCs with him I would return to find him ostentatiously cleaning and complaining about mess, with the DCs all sitting on the couch, tight lipped. Some of their stuff would be thrown away, like your DD's creation.
It was a MH problem with exH all right
- it's known as being a controlling, entitled jerk who likes to have everyone pay attention to him and can't stand it when other people are happily engaged with something else.
As my exH put it in a rare moment of candour, 'The children should only be happy when I want them to be'. So we walked on eggshells. Is this the feeling you get here, OP?
You have very clearly described a situation he has set up where you and the DCs can't win no matter what you do:
At the end of the day all the toys are cleared away but even seeing a toy box in the living room is enough to stress him out. Then if I was to put it all into their bedrooms he would claim they have too much toys and they need to go. They honestly don't have too much.
This is not about toys or mess.
It is about your H playing power games with you all.
Don't try reasoning with him.
Stand up to him. He can put up with normal children's activities or he can get help.
You do not owe him any accommodation. The problem here is emotional and psychological abuse. He is bullying you all.
I recommend you buy and read 'Living with the Dominator' by Pat Craven.
Don't share it with your H.