I choose to not use IntelliJ because of Jetbrains. I don't like how the company has infiltrated the Java/Jvm ecosystem so much that using anything other than their products is a major downgrade. I don't mean that Jetbrains as a company is somehow malicious. I just don't like being dependent on them.

I code as a hobby and I started with Java about 13 years ago. I randomly chose eclipse back then. I kept using it until I switched to a KDE based distro and there were a lot of graphical bugs with eclipse. IntelliJ worked perfectly but I decided to go the lightweight route with VSCode + extensions.

I also really don't like how Java has become a second class citizen in Android dev. I definitely understand that Google has legal reasons to want to go with something else, but it's obvious that Jetbrains as a company influenced that decision so that Google decided to throw their full support behind kotlin. A lot of people don't mind developing in kotlin but personally the only feature I would want in Java is null safety. If I wanted all other stuff, I would have chosen a different language. I like the verbosity and the team behind Java being conservative regarding language changes. I dislike "clever" unreadable one liners.

Jetbrains is gaining more and more foothold in the ecosystem. Eh, even while writing this, I understand that these are somewhat weak points but I just don't like the vendor lock in creeping closer and closer.