Comment by littlecranky67

The problem is that `partial` in C# should never even have been considered as a "solution" to write small, maintainable classes. AFAIK partial was introduced for code-behind files, not to structure human written code.

Anyways, you are not alone with that experience - a common mistake I see, no matter what language or framework, is that people fall for the fallacy "separation into files" is the same as "separation of concerns".