An integer type? Sane equality comparison operators? An event system that isn't horrible? Throwing exceptions in reasonable places instead of failing silently for a while and then throwing the exception?

No other language can execute as quickly

Forth, fortran, rust.

give you direct access to hardware

Forth, fortran, rust.

provide a rock-solid foundation of reliability

You have got to be kidding me. C is reliable? Forth at least does basic bounds checking, and rust does a lot more. C gives you almost nothing in terms of reliability.

express the most complex algorithms succinctly

What are you even smoking? If I attempted to list the languages that express complex algorithms more succinctly than C I would die of old age.

offer a huge ecosystem to make you productive

Ecosystems occur over time. If people started committing to a better language it would build an ecosystem.

Rust has everything you listed except the ecosystem, and that is coming. Then again, C doesn't have two of the things you listed, so according to your criteria Rust is actually better already.