I have to totally agree with you. I have tried maximizing the UI Scale using the interface editor, but it does not increase the tool tip text size when I scroll over items. I really hope the developers fix this, because it seems to be an issue in the game. I would prefer not to lean over the desk or strain my eyes. I think the image you gave was a good example. I run my game on 1920x1080, and the tool tip text is just as bothersome.