>if you use TypeScript in an object-oriented way

I don't follow this one. I've never seen anyone use TypeScript with an OO approach aside from, ironically, the .NET folks.

The code I wrote has nothing OO with it and we can already see the issues. The majority of TS I've ever worked with was written for React and it still would benefit greatly from nominal types as you call them (thanks I didn't know that terminology).

I don't see everyone misusing TS. For me, it's simply a very limited language as far as typed languages go. As a result, it's a shame that it's what is being touted as a good example of why you should use typed languages.