I’d have to agree with this, there was a time where Plex was amazing. after like the 3rd time I was forced stop it from hiding my library and them pushing services in my face I made the switch to Jellyfin. It’s been long enough now that I don’t recall the features I miss, and overall Jellyfin is fine, and seems to get better pretty consistently.

Python is pretty easy to pickup and super popular so there are tons of guides and libraries to help get the job done. It does have a library called PyGame but honestly it is not super powerful, however there is a FOSS engine called Godot that uses what they call gdscript, which is very similar to Python.