The most successful program, Accelerating Commercialisation (or Commercialising Acceleration, or whatever this year's government is calling it) requires matching funding, only funds a specific project, and takes around 3-6 months to complete the application process. Very suitable for a existing small business trying to create a new product line, totally useless for a startup trying to iterate in a new market quickly.
The grant also comes with a case worker to follow progress, and the money is released in tranches according to achievement milestones. All sounds great on paper, but it completely ignores the fact that the original plan will definitely change in response to new information or market changes.
I've known a few people who've been through the process, and they all said that the money wasn't worth the hassle involved.
And that's the best, most successful government funding program. The others are worse, way worse.
The root cause is that the mindset needed to be a successful bureaucrat is so far away from the mindset needed to be a successful entrepreneur. There's no way any program that would actually be useful to entrepreneurs will be acceptable to the bureaucrats who administer it.
Also, the purpose of any funding program is complete the moment that a politician steps up to a TV camera to accept credit for creating it. Anything that happens after that is pointless/just a bonus. The point of all these programs is not to actually help new businesses, but to help political careers.
My advice to anyone looking to get government help for their business is to not bother, it's just a distraction from communicating with customers. And it'll be five times as time-consuming and painful as you expect, with one fifth the return you expect.