Who picked Deno at your company? It's a odd choice given it's limited support.
Even if it's fine for some use cases, it sounds like a poor fit for your needs.
The main problem is that we spent more time doing trial-and-error than actually developing software.
Maybe it was a bad choice, yes.
Maybe C# would be a better fit?
Thanks for your advice!
C#, Java, and to a lesser extent NodeJS and Python are enterprise level backend languages with support for whatever you can imagine.