

Notepad in wine is pointless compared to something like gedit, which you have, or similar editors like geany or kwrite. Cinnamon might even have their own basic text editor. And then there are further options like mousepad from the xfce project or featherpad from the lxqt project.
Notepad in wine will just lead to frustration because of poorer integration.
Finally, I just saw your edit and I think you’re spot on. Not because of ARM, which is actually decently supported, but because running an OS off of a microSD card is slow and tedious. It just isn’t made for that quick, small random access.
It sounds like you are also possibly overheating. You don’t have hardware decoding for av1 on that computer so it’s all cpu work. But from my extensive use and testing with AV1 there is nothing about your hardware that should fail to play back 1080p 30fps av1 video.