I've learned to not hate the address space/notation. There are some neat things built in like rotating the globally scoped address so individual machines in your house/network are more difficult to track (which doesn't matter today since everything is tracked via browser fingerprinting).

IPv6 was created a long time ago and was pretty ambitious. Every IPv4 address can be represented as an IPv6 address (e.g. 192.168.10.10 is ::ffff:c0a8:0a0a) and had a path to adoption via 4-in-6 tunneling, but it wasn't until the past decade anyone has really implemented IPv6 only networks like that at scale (mostly mobile providers, T-Mobile being the earliest example in most countries).

Most ISPs don't bother though, keeping things dual stack and switching IPv4 to carrier based NAT (100.x)