>>7635773 (OP)look I thought about this a lot, the answer is that you do what you value / what you want, you don't think putting in the hours to polish a sketch is worth your time, subsconsciously, so you never do. If you were to only draw for, say, expositions, you would finish all your drawings, because now it's super worth it.
so basically either change your art objective, or value secondary things on the monotone act of polishing, like a semi meditative state, or it being fun while watching videos on the background or something else
in my case I gave up temporarily and just pursue level 3/5 of polish for social media, while doing 4.5/5 for commissions and such