I wonder if it’s complexity that makes it less fun? I have been programming for 38 years and went through a similar feeling. After the lockdown I picked up RISCOS and BBC basic, and learned the Teletext display standard (mode 7) in BBC basic. The feeling of being able to quickly understand a simple system and make stuff is great fun. Learning Teletext layout is only a few pages of reading and the standard itself for mode 7 fits on one A4 sheet. RISCOS is another simple thing to learn and you can access every aspect of the OS through BBC basic calls. I spent a few weeks doing this and then returned to unity c# work. I started with the Pico build for raspberry pi and thus - no mouse and using the text editor to write BBC basic. When I returned to using modern tools I had a new found appreciation of the power at my fingertips and got my mojo back. Having a break and doing something completely different for a while worked for me.