I set my game's resolution to 1920x1080 but everytime I start it there are scrollbars and the game window is "too zoomed" so I have
to use the scrollbars to see all the elements in the game.
It's difficult to help you without knowing more details, but what you describe sounds like the game is in windowed mode and your computer's resolution is equal to or lower than 1920*1080.
If the game has the same resolution as your screen, then you should play in full screen mode.
If you want to play in windowed mode, the resolution of the game must be lower than the resolution of your screen and not the same, because the edge of the window, as well as the windows bar, will take up space.
What kind of underlying framework/ engine gives you scrollbars for the actual game area?
Is this html?
The reported resolution of the Desktop is not the actual resolution. Windows is zoomed for "higher" resolutions. The recommendation is 150% for 1920x1080 displays. So your browser/game might get reported a relative resolution. Also a browser might have a base zoom that is higher than 100%. I see problems on fullscreen web games all the time, so there might be some common pitfalls.
On user end I usually have this custom css active, so I actually do not know, if some of those games would display scrollbars. There is this kinda bug, that sometimes scrollbars are displayed for the space they would take. Meaning, scrollsbars would not be needed, if there were not there. But since they are there, they take up space from the area, making scrolling necessary.
element::-webkit-scrollbar {
display: none;
}
::-webkit-scrollbar {
display: none;
}