> inadvertently leaky

I think this is the main problem.

I don't mind layers of abstraction when they work well and their components compose nicely. Like a well-designed programming language. These can actually be quite fun to work with.

Layers of abstraction where the boundaries between that layer and those around it are fuzzy to non-existent and where certain cases magically work and everything else is a janky mess because it was never designed to work are what give me headaches and want to throw my work laptop out the window on a regular basis.