I wish you the best of luck and hopefully at a later date will be able to have a constructive technical opinion rather than whining because something in my brain was apparently incompatible with your pretty :D
I would say run with Nova if you want to code Erlang. If you want to code Elixir choose Phoenix. In the end both are based on Cowboy.
We started to create Nova from the lack of frameworks on the Erlang side. We wanted a fast way to start new web application and start writing on your app instead of spending time on setup.
Elixir have always had good tooling and framework from the start.
https://youtu.be/PgBzV1-E00k?si=sULVBvLsVPm2S3zl