I hate Intellij Idea but it's best option available to develop in Scala. Improvements in VSCode/Metals is my last hope.

The (few) things I NEED from Intellij:
* Very good autocompletion
* Refactoring tools (renaming, auto imports)
* Search tools (find usages, sub/super-types)

The (many) things I hate of Intellij:

* Layout with panel sizes doesn't behave properly and it scales instead of remaining fixed.

* Tedious 2-hands shortcuts makes the right hand to move a lot from the mouse

* Delays and lag in the UI, freezes on garbage collection

* High memory consumption, high CPU usage and generally slow and cumbersome

* The delay in the UI between commands is so that it's accidentally possible to introduce typos

* Can't move tabs around and organize them as I like

* Ugly font rendering and missing typography settings

* Multi-caret implementation as a different editing mode is annoying because requires frequent switching

* Unnatural code folding regions, why method arguments are not folded with the method?

* Unhelpful support forum, sometimes dismissive answers

* Highlighting of current word under the caret doesn't work

* Very slow editor, can't keep spacebar pressed to move text or it hangs!

* Several settings reset at every update. Like the auto fetch of git

* New features are added and enabled by default which is very invasive

* Some of the features mentioned above are really annoying and it's not possible/not trivial to disable them

* It uses its own compile and several times it highlights false positives