One company owns all of the infrastructure and sells it off to other smaller companies. That is mainly with our 4G mobile network and ADSL.
Our government rolled out our new fibre network horribly, and much of the country has the lower tier fibre lines or even wireless connection instead of wired fibre.
Some areas still use ADSL and alot of rural areas use wireless connections, only the city people/large residential areas have fibre to the node or fibre to the block.
Our mobile network is good (4th best average in the world, something like 50/35) but costs $200+/month AUD for 100gig of data.
Our internet is horrible (something like 45th) and we pay around $100 AUD (I do atleast) for 30/5.
TL;DR: Shit government doesn't listen to population, fucks up the whole countries Internet.