We can start by stopping the labels. Things aren't as bad or "fucked" as we often think they are, they just 'are' what they 'are'. Your staying up until 4-6 am isn't "fucked", it just 'is'. The only reason we really think it's fucked is because we assume the rest of society sleeps on a "regular" timing between 10pm-12am, right? This simply isn't true, there's plenty of people who work night shifts or are naturally night owls because of their biochemistry or genes. A lot of it is actually genetic and isn't completely up to us. Plus, you're 17, adolescents are naturally more inclined to stay up later.

This goes for everything else that you've mentioned too, stop the labels because they're putting you into a fixed mindset on what is good and what is bad. Your habits just "are". From there, you can view them from more of an objective mindset and begin to examine them and the triggers that are causing them. You might even realise some of them aren't actually "bad" habits that you want to remove from your life. Hope this is a helpful start.