I still cannot use special characters in filenames, 40 years of Windows OSes in.

That's a good thing IMO. The benefits of using special characters in this specific case are slim, but the repercussions for every single programming language that ever touches file or folder names (i.e. basically all of them) are pretty big.

Like seriously, I'd wager that entire companies might crawl to a stop because Bernice in accounting put a "/" into some important excel file name.

When I know for a fact I clicked something for it to function and it just doesn't, requiring multiple clicks.

This, but when the UI also reacts and does it's 'button pressed' animation.

I know I pressed the button, you obviously know I pressed the button; why are you not doing the thing???

And I hate it too when it goes to the next song and this banner slowly fades in at the top of my screen to tell me what song it is and it also just pauses everything for a moment just for that. There's other ways I can tell what you're playing, I don't need that.

you can turn that off in the settings. Actually I was pretty happy that it works on linux through wine. but if you can't find the option, let me know, I have managed to find it recently I think