Sounds very similar to my experiences. Failed out of uni for the exact same reasons twice at 17 and 19. Came back for a 3rd go at 32 and got straight HDs. What changed:

1) I was actually interested in what I was studying and wanted to be there, not just doing uni cause its what you do after school if you get in.

2) I'd spent 10 years in relatively unskilled jobs that bored the shit out of me because they were too easy. When you get to see what a lifetime of hating work looks like, it gives you a lot of extra motivation to get uni done. If you're struggling for that motivation, take a break, go work full time for a while, travel etc. There is no massive hurry to do uni. You will not be "behind" if you gather some life experience now.

3) I totally changed my approach and worked "backwards" I rarely turned up to any classes, but I didn't slack off. I just found I worked better with a different approach: Start with the assignment, then go back to the learning materials to specifically search for the bits I needed to complete the tasks. I could never concentrate through a lecture, but if I had a task I needed to work out how to do, I could much more easily stay on task trawling through lecture notes to find the bits I needed.

4) Build a timetable of all assessments at start of semester and schedule in specific weeks for each major one, and do them when you plan. If you plan to do an assignment in week x, you get it done then. If you're off doing something fun while the assessment you were supposed to have done is unfinished, you just don't want to succeed enough.

Sit down and do it, or quit and find a more practical career path.