Although the original goal was great, in hindsight it appears that it could not be delivered anywhere near the original budget. For context, after a prolonged period of centre-right government, a centre-left government was elected, led by Kevin Rudd. He had a progressive agenda, but due to a combination of his unmitigated egotism and internal party conflicts, he instituted a variety of programs that were poorly conceived and executed, and was ultimately ousted by his own party in a fairly disasterous manner. The National Broadband network was a product of this highly disappointing and dysfunctional period of government. Since then the problems have continued across a change back to the centre-right government, who with a very slim majority have essentially stuffed around for the last few years with a lame duck leader who seems hamstrung by the ultra conservatives in his own party.
For my part, I'm dropping all wires and switching to 4G/LTE, where I can stream 4K content, get decent uploads and still pay less than I would on the National Broadband network.