Some great ideas here.
I would ban all rustly wrapping. Manufacturers would have to make all packaging quiet.
Agree with massive fines for spitting in public.
Massive fines for not picking up dog poo.
It would be against the law to complain about the cost of parking. But there would be a universal app for parking and not several different ones, to make things slightly easier. Also, I would create a committee of brainy people to make bus timetables easier to understand and somehow standardised, to help more people use buses.
on a more serious note, I would ban surrogacy.
I would ban manufacturers from scenting things that shouldn’t be scented, like bin liners and sanitary towels.
Every town would have a lovely outdoor swimming pool.
House building companies would have to make all new houses and flats super eco friendly and massively soundproof.
That’s all I can think of for now - realise I’d be a somewhat parochial and petty leader of the universe but would probably come up with some bigger ideas in due course.