If you have a 4k/High DPI monitor it probably looks like this:
Which is entirely unplayable. What you need to do is go to your computer's homescreen and right click an empty space, and navigate to the "Intel Graphics Settings" or whatever the analog is for your graphics card, like in the pic below:
Your screen should look something like this:
Then change your resolution setting to 800x600 and your scaling to Scale Full Screen. This should look like:
Now open your client and set the in-client graphics to resizeable, and maximise your client. Now it should look like:
Not great. But now we go back and change the resolution back to 4k like follows:
And go back to your client and it should look like:
All done! Note that im just zoomed out, its not stuck that zoomed out. You can also make the UI slightly smaller by setting your resolution to something like 1300x768 instead of 800x600 if youd prefer. GL.