The research screen is zoomed in way too much when you open it and while you can zoom out, the limit to how far you can zoom out is set way too low. Getting an overview is way too hard when you can't zoom out to see everything at once, which results in the screen being overly confusing. You should be able to zoom out to view everything at once to get an overview, even if you might not be able to see all details, the player should have access to see the shape of the tech tree.
I have 150% UI scaling, but really any UI scaling should work.
Click on the research button to view the research screen/tech tree. Try to zoom out to get an overview.