This problem is not new - i know it was present in Windows XP, 7, 8/8.1, and now in 10 (and probably 11 too).
If an app uses Ctrl+Alt+something keyboard shortcut, it disables all Alt+ shortcuts. For example Loom app (https://loom.com) uses Ctrl+Alt+C to make confetti effect appear on screen. But Alt+C makes letter ć, widely used in Polish language. So Looms Ctrl+Alt+C completely disables Alt+C, making writing in polish language a lot harder - c is not the only letter we use with Alt, and Loom is not the only app using Ctrl+Alt shortcuts.
Any ideas how to make it work? Googling for a solution is not easy - either i don't know proper words to describe the issue or Google tries to be smarter than me, and throws wrong answers at me.