Perhaps you are going through an essential process of working out a troubling dilemma by posting here, even though you may not have taken advice offered previously or may not do what people advise now.
His behaviour is extremely rigid, obsessive and dictatorial. It's like that of a stern Victorian patriarch and does not belong in the life of families and children now. And you are not protecting your children by letting this dictate their daily lives.
You can resolve to sit down and talk to him about how rigid he is being, that it is not kind to the children and that he needs to allow some leeway for children to experience and do normal things.
Follow that up with naming specific things, as for example, meal times and say firmly that he cannot forbid talking over dinner, that it is important for family life and children's development, and for fun and enjoyment together and that he must put away the radio and tv at those times.
I'm suggesting that you be bold; seize control: change it by starting talking to the children at dinner - consider the old saying 'You have nothing to fear but fear itself'. You have a lot of fear and anxiety. Throw off fear and caution; decide and determine to burst through and break out of that habit of fearing to do anything. Lose your rag for once, if you have to.
Start to do things differently. If you cannot go to fast food places such as McD, just take him and the children to other types of restaurants. Would Italian and pizza pass muster? Buy them the odd packet of sweets or treats, though not every day. Run the washing machine whenever you like, whether he agrees or not. You can explain that it's dangerous at night if he complains. Just do it. For decluttering, get in a professional declutterer. Doing any of these things will be liberating. You may have a row. The sky won't fall in. He'll have to fall in with the new habits, though.
You may not do any of this but you can ponder and imagine such possibilities in your mind and work towards forming a resolve to act and maybe one day you will take that first step.