I've got a somewhat reader base I built up on Wattpad when I was a teenager. Though, many of them require much work before I move them to the next stage. I've also various stories in the planning process so I'm constantly working on something.
I've completed books before so that isn't a major issue for me -- I've never rewritten one of my stories priorly, though, so that will be new for me.
What could help for you is to have some readers give you regular input and you see what you need changed etc but take any feedback with a grain of salt. I don't see any books I've written as a waste of time, more as a way of learning what worked and what didn't.