I feel your pain--broken themes are always near the top when it comes to OS-upgrade hassles. The GTK3 developers obviously don't give a hoot about backward compatibility. I only use their inconsiderate software because I more or less have to. I wish they were more like Linus Torvalds, conscientious about not breaking stuff as the code evolves.

Exactly. I am getting more and more annoyed with GTK3. GTK2 was great but GTK3... not so much. Still whats the alternative? Pretty much all the applications i use are GTK based and the only other toolkit thats used by more than a handful of applications would be QT anyways

Gotta try it. I am using Equilux right now. Colors are pretty nice but the animations and specialy those scrollbars... ugh. Do no want.

Edit: No idea about window controls on Equilux as that's something my window manager makes sure will always look extremly dated

All I liked about Arc-Darker were the color scheme and the window buttons (minimize, maximize, close), which is why I used it as a base. I find the extreme minimalism in today's UIs (including Arc-Darker) to be a disgrace. Therefore, my custom theme is basically Arc-Darker's traditional and more sensible sister.

I thought I'd start this thread so that people can share whatever themes they find/create that have these features.

Here is my contribution: GNUser-Dark

It is mostly based on Arc-Darker, with some pieces scavenged from other themes and/or hacked into submission by yours truly.