[Improvotter]

Apps Script is honestly pretty terrible simply because the "IDE" you're working in is terrible. There is no integration with any proper IDE or text editor. It's using ES5 iirc when it could easily support more advanced Javascript versions or when it could allow you to use Typescript. I only sometimes use it out of necessity, but it remains a huge pain.

[askvictor]

Yeah, the IDE is painful. I think there are ways to expose the script files in drive and edit them outside (possibly even debug in eclipse in a very roundabout way? I might be dreaming). I wish they would integrate with jetbrains (as they've done with android)

[TheQwerty]

There is this: https://developers.google.com/apps-script/guides/clasp

I've not used it and I have a feeling it doesn't really help one take full advantage of their IDE of choice but it might still beat the online editor.