I don't know that I'd say "messed up", but I do wish C# had checked exceptions. I strongly believe that they are superior to non-checked exceptions, basically static type signatures but for error handling. It's a real pity that everything after Java seems to have abandoned the idea.
Java itself has basically abandoned the idea, or at least the ecosystem at large has. Checked exceptions are a decent idea but Java's implementation sucks. It needs to be a lot more automatic or something
