Ireland and Britain enjoy better competition since they're a smaller area. Australia and the US OTOH are terrible since the population is so spread out (Australia's slightly better as the population is mainly coastal).
That's a cop-out. Services in the UK are either over the Virgin cable (HFC) network, or BT-owned copper/FTTC. The reason there's competition is a solid system of regulation which ensures fair and reasonable access to the infrastructure.
That's quite a different posture though. BT was a government owned corp, and when it was privatized, investors bought it subject to the restrictions in its license. In comparison, the cable companies built their infrastructure against the backdrop of deregulation, in which it was illegal for them to be granted exclusive franchises.
No Britain enjoys better competition because BT's final mile is heavily regulated so that competitors can offer services and are charged regulated prices for access to the unbundled local loop.
The BT Group was also forcibly split into separate operating companies, particularly OpenReach which owns the local loops and sells services to all ISPs including BT Retail.
