Python doesn't have anything remotely close to this problem, as you can't (reasonably) write Python for the browser.

JavaScript has this problem because it's actually a somewhat attainable goal.

The main problem is that once you run into a problem not explicitly solved for by whatever Node.js framework that's holding your hand, you're in deep trouble, very quickly, unless you have a more "classical" software development background.

You can write Python code for the browser, and it’s even good for some specific use cases. Dash or Gradio for example.

Which language do you use for web stuff?

JavaScript, which is why "you must hate JavaScript" is a confusing thing to say to me...