The private sector wouldn't even exist without government. It would have no roads to deliver its products on, no airwaves to advertise its products on, no internet to sell its products through, no education system to provide it with a workforce that can read and do math, no intellectual property law allowing it to profit from what it creates, no police force to protect its factories and its employees from violence, etc.
There are private roads and would be more if government didn't provide roads, but all in all there's nothing wrong with government funding for road projects. Airwaves would exist without our government. The internet would exist too. It's a product of globalization unless you believe Al Gore created it. Do you believe Gore created the internet? No one is saying to get rid of the government but it sure seems to be how you're taking people who disagree with you. Our police force is a very important part of our safety but their jobs aren't in the private sector in case you don't understand that difference between public and private sector. There's plenty of private schools who are doing fine. We still need to have a public education system. Again this isn't the private sector. You'll probably take all of what I said out of context in order to form a new talking point, but there's a chance you'll learn the difference from private and public sector.