It's very very tough living with a hoarder. When we split up, funnily enough I got left with the hoard. His was an 'organised' hoard too, so I didn't realise how much stuff there was! I got him to come and take what he wanted, and it was a couple of cars full, that's all. It took me a couple of years to get rid of the rest. Most of it down the dump. Hoarding is a very odd mindset for those not afflicted.
What I do want to add, is that if you separate, you will be able to handle your finances your way, and if you can't work you'll qualify for UC. He also needs to support his child financially. In your shoes, knowing money is tight, I'll recommend citizens advice as solicitors are expensive ( though many offer free 30 minute appointments so you get an inkling of what your rights are)
If you're like I was, you're totally overwhelmed by stuff, inside your home and inside your head. But he is abusing you, taking over your home with all his shit. I was fortunate to have a counsellor who helped me see the wood for the trees. Again, as recommended above, do try women's aid for some support and clarity. This is no way for you and your children to live.
All this 'free' stuff is costing you emotionally and financially. I promise you it will impact on your CF, if it's not already. I suffered it too, but managed to convince myself I was lazy. My ex lied to me and hid debt from me. I wouldn't be at all surprised if yours is doing the same.
How are you feeling today? You've had such a lot of comments you must be feeling overwhelmed from that as well. They all seem to be with your best interests at heart though. How about turn your phone off for a bit, get some fresh air ( on school run perhaps?) relax with your little one and just think about how your home could look with clear spaces and places to put their bikes, and crafts.
So much love from someone who's been where you are. He isn't correct, by the way, that any of this is in any way your fault. Mine tried that, too. And you really don't have to worry what the in laws will think or do!
They've really done a number on you, haven't they? 😔 You deserve better 💐
Ps - do take photos of the clutter! I didn't, but later wished I had!