I started Android development recently at work.

I will confidently back you up. I am a well-rounded programmer, and have used many languages and domains. Kotlin (in the Android SDK at least) is the most complicated, messiest, least-pleasant I've found. JS/Node is second place.

I'm reasonably confident it's not the Kotlin language itself I dislike, so much as the tooling associated with it, and the expected project structure.