Windows 10 display looks too small
Can't this be related to your MacBooks high screen resolution. Try with zooming your display in Windows. Zooming will make everything on the screen larger and will hopefully make everything less small for you.

The setting is in the control panel and display/resolution settings.

Also, check out this answer from the Apple support forum that gives a more step by step instruction: Link


  
  Right click on the desk and choose "Display settings"
  Click on the "Advanced display settings" link
  Click on the "Advanced sizing of text and other items" link
  Click on the "set a custom scaling level" link in the "Change size of items" paragraph
  Change to option in the drop down to 100%
  Log out and log back in