You are only looking at the compiler without standard library, and all the nice tools modern C and C++ developers have grown to enjoy since 1979.
You should be comparing to a C compiler for MS-DOS.
If you want to do a proper comparisation you should include GNU/Linux libraries for all major architectures already compiled, GUI frameworks, IDE, .NET, Python, node, Java SDK, Azure integration SDKs, device drivers,...
because of dynamic linking, the standard library is already included in microsoft windows, and all that other crap isn't needed to get blas and lapack to build
Microsoft's Universal CRT, present by default in Windows 10, and installable on Windows 7 SP1 and later.
Linking to UCRT using an entirely FOSS toolchain is, alas, nontrivial, but supported by mingw compilers (gcc and clang; no idea about the various FOSS Fortran compilers):
You should be comparing to a C compiler for MS-DOS.
If you want to do a proper comparisation you should include GNU/Linux libraries for all major architectures already compiled, GUI frameworks, IDE, .NET, Python, node, Java SDK, Azure integration SDKs, device drivers,...