Wow, I love JS, because I can get things done fast, however for stable code, I usually go for TypeScript (which transpiles to JS).
The worst language I ever had to work with was ABAP. It feels like a DB query language overloaded with everything one needs for GUI and logic in the worst way possible. It's old and clunky, and I hate it. Luckily, I don't have to do anything in it anymore.
