"Don Syme: My main responsibility is the design and implementation of the F# programming language. I've also worked on the design of virtual machines, the C# language (being co-responsible for C# and .NET generics, and one of many contributors to C# asynchronous programming) and, indirectly, Visual Basic and other .NET languages."
History, by way of the C# design team, has validated his opinions. Don Syme has had a massive influence on C# even when one degree removed from it's design. His complaints should be considered carefully.
Mark Seemann has a good write up about his contributions: https://blog.ploeh.dk/2015/04/15/c-will-eventually-get-all-f...
That being said, not everything is a fit (otherwise what's the point of F#?) and much of the post here seems to be edge cases or personal preference than C# defects.