1 px borders on 4k screens. Bad contrast which you cannot change because colors are not configurable. Need to scale my monitor (Windows) because i cannot use custom fonts. Titlebar cluttered with other GUI elements. Ribbon using a good amount of vertical space. Unusable scrollbars - too small/no scroll buttons at end - good luck scrolling through a 500 pages pdf. Settings resetted with updates. Automatic updates which change the way the programm works. And so on and so fort.