I think your days in a row is higher? you got up to 4 and then reset to 2 again, might have been because I mentioned day 1 haha
Well if it's any consolation, I've totally been there done that for how you're feeling. I think when old habits return it's a lot easier to get rid of them the second time, like with my eternal battle with slant.
I think I also need to use a heck of a lot more construction for a heck of a long time. I'm very good at seeing images in scribbles and stuff but having construction a part of my process might help me not overthink coming up with images. At least I've done enough stick figure regimens to get used to this more, but I can consciously do it for characters now. Maybe this'll help.
As an overthinker I support this analytical process. Once you find what you're lacking you can really boost yourself up. Sometimes it's just method, sometimes it's how you think, etc. And plenty of trial and error! Even knowing what methods don't work will help later on with future problem solving.
Something that has helped me, is doing a maximum high level piece, as you say a polished finished work. I did it with cute girls (TM) and now I'm doing it for Inktober, and it REALLY gives you an insight into your abilities. Especially with an iterative development style, you can improve your proportions and concepts over and over to get to a high level.
So I really recommend you try that out. It might take a bit of courage because you might fear that the end result won't be great or whatever, but it will still end up being higher than normal because of the time and effort put in.
And then afterwards have a good think about what went wrong, what went well, how you would have improved it etc.
The main advantage to this is that you use skills at every level, sketching to fine linearting, colouring to shading. It gives a proper value to all your skills.