Got ya.

The lead screw is definitely bent. It's not bowed like some others i've seen, but bent at the very tip, right by that coupling. Which makes sense, since this is how it came in - https://drive.google.com/file/d/1p2nLg54FoTDSluWfnoMEq0tlRBHTHX9r/view

It's a very weird type of a bend because i see almost no play at the top of the screw when the platform is up. I guess it's stabilizing the rod.

I tried using SuperSlicer and as part of it's end G-code it lowers the platform all the way down. It was only then i realized where the bend is. The top of the screw went from having no play to going nuts. All in the last like 50-80 mm. I've been printing mostly small things, so the platform just never made it down that far before. Too "green" to know to check it when setting up the printer.

So yes, it's definitely bent. At this point it will probably be a good idea to grab a new coupling just in case. Most of the kits include one anyway.

That is, of course, if i can figure out which one to actually get :)

I've been asking all day, and so far it looks like this one should work (Tr8x8 2mm 4 starts) https://www.amazon.com/gp/product/B08JPNMWP8/ref=ox_sc_saved_title_1?smid=A2E52U58FCDBRC&psc=1 . But no one can say for sure.

thank you for your help, btw.